Answer:
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Find the size of the angle marked a and b on the diagram
2 answers:
Answer:
<h2>a = 52°</h2><h2>b = 38°</h2>Step-by-step explanation:
We know:
Angles in a triangle sum to 180°.
Therefore:
52° + 90° + b = 180°
142° + b = 180° |-142°
<h2>b = 38°</h2><em>(look at the picture)</em>
a + b = 90° ⇒ a + 38° = 90° |-38°
<h2>a = 52°</h2>or
Angles 52° and a, are alternate interior angles. Therefore they are congruent.
<h2>a = 52°</h2>
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Answer:
D. 59.66
Step-by-step explanation:
The formula is <em>A = = 3.14</em>
so we need to find the area's
9 x 9 = 81
81 x 3.14 = 254.34
Next circle.
10 x 10 = 100
100 x 3.14 = 314
Now to find the difference.
314 - 254.34 = 59.66
59.66
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