Question

(PLEASE HELP!) Annie wishes to build a set of five stairs according to the plan below.

(a) How high is each step?
(b) How wide is each step, correct to 2 decimal places?​

Answer 1

a)

sin30=high of steps/175

sin30=1/2

so

high of steps= 175/2

high of steps=87.5cm

b)

cos30=wide/175

cos30=3^1/2÷2

wide=175*3^1/2÷2

3^1/2=1.73

so

wide=175*1.73/2

wide=151.37