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2 answers:
Answer:
117
Step-by-step explanation:
Let find some relationships for angle 7. Looking at a angle near 63, Angle 2.
Angle 7 and Angle 2 are same side consecutive interior angles since they are parallel lines. This means they are supplementary. Keep that in mind.
Angle 2 and the 63 degree angles are vertical angles. This means angle 2 measures 63.
Since angle 2 and angle 7 are supplementary and angle 2 equal 63. We can use substitution method to replace angle 2 with 63. equation.
Angle 7 equal 117
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Answer:
DE = 20units
Step-by-step explanation:
In Δ ABC,
angle A is congruent to angle B.... (given)
therefore, ΔABC is an isoceles triangle.
therefore, CA = CB..... (side opposite to congruent angles are congruent in an isoceles triangle)
therefore, CB = 4 units
In ΔCDE,
angle D is congruent to angle E.... (given)
therefore, ΔCDE is an isoceles triangle.
therefore, CD = CE
therefore, CD = 8 units
ΔCDE ~ ΔCBA
therefore,