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jeka94
3 years ago
11

In the rhombus ABCD, ĐDAE = 30°. Which is ĐABC?

Mathematics
2 answers:
viktelen [127]3 years ago
4 0
C 120’ is the answer
polet [3.4K]3 years ago
3 0

Answer:

C. 120 deg

Step-by-step explanation:

All sides of a rhombus are congruent.

That means that triangle ADC is an isosceles triangle with AD = CD, so angles DAE and DCE are congruent.

m<DAE + m<DCE + m<ADC = 180

30 + 30 + m<ADC = 180

m<ADC = 120

Opposite angles of a rhombus are congruent, so

m<ABC = m<ADC = 120

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