All rectangles are quadrilaterals.

TrueFalse

True

Step-by-step explanation:

A quadrilateral is a shape with 4 sides and 4 corners. A rectangle by definition is a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square. Therefore, a rectangle is always a quadrilateral.

answer:   rotate 270° clockwise about (7, 1) and reflect across the line x = 7

step-by-step explanation:

because i took test

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²