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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.

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

2.

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

3.

Find the area (in m²) of an isosceles triangle, each of whose sides is 10 m and base 12 m.
 
Hint      

4.

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

5.

The base of a triangle is twice its altitude. If the area of the triangle is 144 cm², find its base (in cm).
 
Hint      

6.

Calculate the side (in cm to the nearest integer) of an equilateral triangle whose height is 10.4 cm.
 
Hint      

7.

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

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