Take Class 7 Tuition from the Best Tutors
Search in
Answered on 05 Mar Learn The Triangle and its Properties
Sadika
In the given figure, where D is a point on side BC of triangle CAD, several triangles can be observed:
So, there are a total of four triangles observed in the figure.
Answered on 05 Mar Learn Lines and Angles
Sadika
A linear pair consists of two adjacent angles whose sum is 180 degrees.
If one of the angles forming a linear pair is an obtuse angle, then the other angle must be:
180° - (measure of the obtuse angle)
Since the sum of the two angles forming a linear pair is 180 degrees, and one of the angles is obtuse, the other angle must be acute.
Therefore, if one angle forming a linear pair is an obtuse angle, the other angle is an acute angle.
read lessAnswered on 05 Mar Learn Practical Geometry
Sadika
To draw triangle PQR with side lengths PQ = 3 cm, QR = 4 cm, and RP = 5 cm, as well as the bisector of angle Q, follow these steps:
Start by drawing a line segment QR of length 4 cm.
At one end of the line segment QR, mark point Q.
With Q as the center and a radius of 3 cm, draw an arc to intersect the line segment QR. Mark this point as P.
Now, with Q as the center and a radius of 5 cm, draw another arc to intersect the line segment QR. Mark this point as R.
Connect points P, Q, and R to form triangle PQR.
To draw the bisector of angle Q, first, find the midpoint of side QR. Let's call this point M.
Draw a straight line passing through point Q and the midpoint M of side QR. This line is the angle bisector of angle Q.
Now you have triangle PQR with side lengths PQ = 3 cm, QR = 4 cm, and RP = 5 cm, as well as the bisector of angle Q.
Take Class 7 Tuition from the Best Tutors
Answered on 05 Mar Learn Practical Geometry
Sadika
Answered on 07 Mar Learn Symmetry
Sadika
The line of symmetry of a semicircle is the vertical line that passes through its center, perpendicular to the base (the diameter). This line divides the semicircle into two mirror-image halves.
Yes, a semicircle does have rotational symmetry, but its order is 1, meaning that it only matches its original shape in one orientation through a full 360-degree rotation. However, if we consider the concept of rotational symmetry in the context of being able to rotate an object less than a full circle (360 degrees) and have it appear the same, then a semicircle exhibits rotational symmetry of order 2 when rotated 180 degrees around the midpoint of its diameter. This is because flipping it 180 degrees around this point will present the same shape and orientation due to its symmetrical nature.
Answered on 07 Mar Learn Perimeter and Area
Sadika
First, let's find the area of one marble tile:
Area of one tile = Length × Width = 10 cm × 12 cm = 120 cm²
Now, we need to convert the area from square centimeters to square meters since the wall size is given in meters.
1 square meter = 10,000 square centimeters
So, 120 cm² = 120 / 10,000 m² = 0.012 m²
Next, let's find the area of the wall:
Area of the wall = Length × Width = 3 m × 4 m = 12 m²
Now, to find out how many tiles are needed, we divide the total area of the wall by the area of one tile:
Number of tiles = Area of the wall / Area of one tile = 12 m² / 0.012 m² = 1000 tiles
Therefore, 1000 marble tiles will be required to cover the wall.
Now, let's find the total cost of the tiles at the rate of Rs 2 per tile:
Total cost = Number of tiles × Cost per tile = 1000 tiles × Rs 2 per tile = Rs 2000
So, the total cost of the tiles will be Rs 2000.
Take Class 7 Tuition from the Best Tutors
Answered on 07 Mar Learn Perimeter and Area
Sadika
First, let's convert the dimensions of the table top into centimeters, since the rate given is in paise per square centimeter:
Length of the table top = 9 dm * 10 cm/dm + 5 cm = 90 cm + 5 cm = 95 cm Breadth of the table top = 6 dm * 10 cm/dm + 5 cm = 60 cm + 5 cm = 65 cm
Now, let's calculate the area of the table top:
Area of the table top = Length × Breadth = 95 cm × 65 cm = 6175 cm²
Now, let's find the cost to polish the table top at the rate of 20 paise per square centimeter:
Cost = Area of the table top × Rate = 6175 cm² × 20 paise/cm² = 123500 paise
Since 100 paise = 1 rupee, we divide by 100 to convert paise to rupees:
Cost = 123500 paise / 100 = Rs. 1235
So, the cost to polish the table top will be Rs. 1235.
Answered on 07 Mar Learn Perimeter and Area
Sadika
First, let's find the area of one tile:
Area of one tile = Length × Width = 22 cm × 10 cm = 220 cm²
Now, we need to convert the area of one tile from square centimeters to square meters since the room dimensions are given in meters.
1 square meter = 10,000 square centimeters
So, 220 cm² = 220 / 10,000 m² = 0.022 m²
Next, let's find the area of the room:
Area of the room = Length × Width = 9.68 m × 6.2 m = 59.936 m² (approximately)
Now, let's find how many tiles are needed to cover the floor of the room:
Number of tiles = Area of the room / Area of one tile = 59.936 m² / 0.022 m² ≈ 2724 tiles
Now, let's find the total cost of the tiles at the rate of Rs 2.50 per tile:
Total cost = Number of tiles × Cost per tile = 2724 tiles × Rs 2.50 per tile = Rs 6810
So, the total cost of the tiles will be Rs 6810.
Answered on 07 Mar Learn Perimeter and Area
Sadika
To find the area of the square field, we need to square the length of one side:
Area of the square field = (Side length)² = 179 m × 179 m = 32041 m²
Now, let's find the cost of raising a lawn on the field at the rate of Rs 1.50 per square meter:
Cost = Area of the field × Rate per square meter = 32041 m² × Rs 1.50/m² = Rs 48061.50
So, the cost of raising a lawn on the field will be Rs 48061.50.
Take Class 7 Tuition from the Best Tutors
Answered on 07 Mar Learn Perimeter and Area
Sadika
First, let's find the distance around the field, which is the perimeter of the rectangle:
Perimeter of the rectangle = 2 × (Length + Width) = 2 × (290 m + 210 m) = 2 × 500 m = 1000 m
Now, let's find the time it takes for the girl to go two times around the field:
Distance covered = 2 × Perimeter of the field = 2 × 1000 m = 2000 m
Given that the girl walks at the rate of 1.5 m/sec, we can use the formula:
Time = Distance / Speed
Time = 2000 m / 1.5 m/sec ≈ 1333.33 sec
So, it will take approximately 1333.33 seconds for the girl to go two times around the field.
UrbanPro.com helps you to connect with the best Class 7 Tuition in India. Post Your Requirement today and get connected.
Ask a Question
The best tutors for Class 7 Tuition Classes are on UrbanPro
The best Tutors for Class 7 Tuition Classes are on UrbanPro