If the perimeter of a square is 24, find the length of a diagonal.

-- All 4 sides of a square have equal length.

-- If the perimeter of a square is 24, then each side is (24/4) = 6 long.

-- When you cut the square along the diagonal, you have

a right triangle, with both legs 6 long.

The diagonal of the square is the hypotenuse of the triangle.

-- The length of the hypotenuse is the square root of

(one leg squared) plus (the other leg squared).

In this triangle, that's (6² + 6²) = (36 + 36) = 72 .

So the length of the hypotenuse is √72 .

Let's simplify that:

√72

= √(36 · 2)

= √36 · √2

= 6 · √2

There you have it . . . something worth remembering:

The length of the diagonal of a square is always

the length of one side, multiplied by √2 .

my answer is$ 12

step-by-step explanation:

because 15 -2=12

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°