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1 vote
A. 42
B. 48
C. 43
D. 49

A. 42 B. 48 C. 43 D. 49-example-1
User Zhujik
by
7.9k points

1 Answer

6 votes

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Answer:

A) 42°

Explanation:

The whole is the sum of the parts. Lines AH and BC cross at right angles, so angle CDE is a right angle. Then angles CDJ and JDE will have a total of 90°.

∠CDJ +∠EDJ = 90°

3x° +(2x +10)° = 90°

5x = 80 . . . . . . . . . divide by °, collect terms, subtract 10

x = 16 . . . . . . . . divide by 5

(2x+10)° = (2(16) +10)° = 42°

Angle EDJ is 42°.

User Jstr
by
8.9k points

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