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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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The answer is 5.13 in²

Step 1. Calculate the diameter of the circle (d).
Step 2. Calculate the radius of the circle (r).
Step 3. Calculate the area of the circle (A1).
Step 4. Calculate the area of the square (A2).
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Step 1:
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Step 2.
The radius (r) of the circle is half of its diameter (d):
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Step 3.
The area of the circle (A1) is:
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Step 4.
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Step 5:
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