If quadrilateral abcd is an isosceles trapezoid, then which of the following statements must be true?

D)  < B + <D = 180

Step-by-step explanation:

isosceles trapezoid

<A = <D

<B = <C

so <A + <C = 180

or < B + <D = 180

B+D = 180

Step-by-step explanation:

An isosceles trapezoid mean the base angles are equal.  That means angles A and D are equal.  Then angles C and B are equal.  Therefore opposite angles are supplementary

A+C = 180

B+D = 180

But since A and D are equal

D+C = 180

B+ A = 180

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation:

answer:

c) the x-coordinate of the center of the circle increases by 3