find the perimeter of an isosceles right triangle having an area of 200cm square
Answers
Answer:
Step-by-step explanation:
Solution -
Area of a triangle = 1/2 * b * h
As it is an isosceles right triangle, b = h
Therefore, Area = 1/2 * b * b = 1/2 * b^2
200 = 1/2 * b^2
b^2 = 400
b = 20 cm
Therefore, b = h = 20 cm
Perimeter of a triangle = b + h + sqrt (b^2 + h^2)
= 20 + 20 + sqrt ((20)^2 + (20)^2)
= 40 + sqrt(400 + 400)
= 40 + sqrt(800)
= 40 + 20 sqrt 2 cm
= 40 + 20 * 1.414 (as sqrt 2 = 1.414)
= 68.28 cm
Answer - Perimeter of an isosceles right triangle = 68.28 cm