Find the lengths of the missing sides in the triangle. Write your answers as integers or as decimals rounded to the nearest tenth.

Solution:

The above figure shows an isosceles right angled triangle, which means that

y = 7

cos 45 = y/x

cos 45 = 1/√2

y/x = 1/√2

7 / x = 1/√2

x = 7√2

x = 9.899

x = 9.9

Find the lengths of the missing sides in the triangle. Write your answers as integers or as decimals rounded to the nearest tenth.

Summary:

The lengths of the missing sides in the triangle are y = 7 and x = 9.9