Question

Triangles A and B are congruent. Find the perimeter of triangle A. Give your answer to 1 dp. 11cm A 19cm B Not drawn accurately.​

Answer 1

P ≈ 45.51

Explanation:

19cm is the hypotenuse (C)

11cm is the opposite (A)

adjacent (B) missing

formula a² + b² = c²

So we need to find b which is b²= c² - a²

b² = (19)² - (11)² = 240

b = square root of 240

b = 15.5

P = a+b+a2+b2

P ≈ 45.51