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Math - Geometry Lesson Plans : Perimeter & Area of Triangles


Mensuration - Solve each exercise problem related to perimeter and area of triangles given below.

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1.

Find the area (in cm²) of a triangle with base 12 cm and height 7 cm.
 
Hint      

2.

Find the length of the hypotenuse (in cm) of an isosceles right-angled triangle having area of 484 cm².
 
Hint      

3.

Calculate the height (in cm to the nearest integer) of an equilateral triangle whose area is 36.95 cm².
 
Hint      

4.

Calculate the height (in cm) of a triangle whose base is 24 cm and area is 180 cm².
 
Hint      

5.

Calculate the area (in cm² upto 1 decimal place) of an equilateral triangle of side 10 cm.
 
Hint      

6.

If the area of an equilateral triangle is 36√3 cm², find its perimeter (in cm).
 
Hint      

7.

The base of a right-angled triangle is 5 cm and its hypotenuse is 13 cm. Find the area (in cm²) of the triangle.
 
Hint      


 
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