Question

Work out area of the triangle and give answer to 1.dp

Answer 1

A ≈ 62.8 cm²

Explanation:

the area (A) of the triangle is calculated as

A =
`(1)/(2)` ab sinC

where a = 10, b = 13 and C = 105° , then

A =
`(1)/(2)` × 10 × 13 × sin105° = 65 × sin105° ≈ 62.8 cm² ( to 1 dec. place )