-21 = 4x + 7 It's those 2 step equations please explain how to do it thank you.
1 answer:
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Check the picture below.
notice chord QR is a diameter, thus the vertex at P has a right-angle by Thales theorem.
Step-by-step explanation:
the 2 angles marked with orange and green are equal becos the question said that the indicated angles are congruent meaning same deg. so 180 - that given angle = the 2 marked angles (based on the rule known as angles on a str line are supplementary)
since the 2 marked angles are same, you can say that d and k are parallel due to the rule of alternate angles
Topic: angle properties
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