Trapezoid A B C D is shown. Sides A B and D C are parallel. Sides A D and B C are congruent. Angle B is (3 x) degrees and angle D is (9 x) degrees. What is the value of x in trapezoid ABCD?

x = 15°

Step-by-step explanation:

AD = BC = > ∡A = ∡B = 3x

                    ∡C = ∡D = 9x

∡A + ∡D = 180°

3x + 9x = 180°

12x = 180°

x = 180° : 12

x = 15°

three-fourths of an hour

36÷48=0.75

0.75=

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing

step-by-step explanation: