Proving the Parallelogram Side Theorem Given ABCD is a parallelogram.
Prove: AB CD and BC DA
Angles Segments Triangles Statements Reasons
del of parallelogram
unique line postulate
del of alt, interior angles
alternate interior angles theorem
B
с
Statements
✓ 1. ABCD is a parallelogram
Reasons
1. given
A
Think about the properties of a
parallelogram

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.

complete the steps to find the area of the trapezoid.

area of rectangle = 256   square units

area of triangle 1 = 24  square units

area of triangle 2 = 16  square units

area of triangle 3 =   96 square units

area of trapezoid = 120  square units

step-by-step explanation:

8

step-by-step explanation: