1. What is common in the four figures
2. What makes figures 3 and
4 different from figures 1
and 27
figure
3. Which among the four
figures show
perpendicularity?
4. When are lines said to be
perpendicular to each
other?​

could you reply to this with the question so i can ?

21.4 i did it already for s1

step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

597

step-by-step explanation: