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Marina86 [1]
3 years ago
12

Not sure how to answer question 4

Mathematics
2 answers:
laiz [17]3 years ago
8 0
D = 86
Because its the nearest degree to 90 as you see < BAC seems to be 90
drek231 [11]3 years ago
5 0

Answer:

<em>Option D is correct</em>

Step-by-step explanation:

Applying the cosine theorem for triangle ABC, you would have:

cos (angle BAC) = (BA^2 + CA^2 - BC^2)/(2*BA*CA)

                           = (10^2 + 18^2 - 20^2)/(2*10*18)

                           = 24/360

=> angle BAC = ~86 deg

Hope this helps!

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sukhopar [10]
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3 years ago
X2<br>2<br>ab<br>ab to<br>b<br>The diagian<br>K<br>n shows<br>rectangle. The shade<br>Find x.<br>​
Norma-Jean [14]

Answer:

x = 28 cm

Step-by-step explanation:

Given:

Area of link shaded regions = 84 cm²

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Solution:

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Width of rectangle (W) = radius of semicircle = ½x

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84 = x²(½ - 1.57/4)

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3 years ago
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