Question

please can someone explain to me how this is done the answer is 85 but how to figure it out I am giving away 10 points the question is one the image and the answer is 85 but just explain how it is done

Answer 1

Explanation:

A =
`(hb)/(2)`

h = 10 cm , b = 17 cm

A = 10 × 17 ÷ 2 = 85 cm²