Question

An isosceles triangle has base length 18 cm and height 4cm what is the approximate length of the two other sides

Answer 1

The approximate length of the two other sides is 10cm

Explanation:

Given

`Base\ Length = 18`

`Height = 4`

Required

The length of the two other sides

Divide the triangle to 2 (See attachment)

Considering one of the triangles, we have:

`l^2 = 4^2 + 9^2`

`l^2 = 16 + 81`

`l^2 = 97`

Take square roots

`l = \sqrt{97`

`l = 9.8488`

`l = 10` --- approximated