3 years ago

Classify each sequence as arithmetic, geometric, or neither by dragging it into the correct box.

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1 answer:

Elena L [17]3 years ago

3 0

Answer:from crud v4v

Step-by-step explanation:

l rfnv u4hf u4ihfcfnoijn3

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$m\angle B=m\angle C=120^{\circ}$

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Step-by-step explanation:

Trapezoid ABCD is isosceles trapezoid, because AB = CD (given). In isosceles trapezoid, angles adjacent to the bases are congruent, then

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Since BK ⊥ AD, the triangle ABK is right triangle. In this triangle, AB = 8, AK = 4. Note that the hypotenuse AB is twice the leg AK:

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If in the right triangle the hypotenuse is twice the leg, then the angle opposite to this leg is 30°, so,

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$m\angle B=30^{\circ}+90^{\circ}=120^{\circ}\\ \\m\angle B=m\angle C=120^{\circ}$

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