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2 answers:
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Answer:
Step-by-step explanation:
1) Tangent makes 90 degrees with the radius. Hence
a) Angle ABD = 90-angle BDC = 90-61.3 = 28.7
b) Triangle BCD is isosceles since tangents have equal length.
Hence angle BCD = 180-(61.3+61.3) = 57.4
c) Angle BDC = 57.4 (since triangle BCD is isosceles)
d) Angle BAC and Angle BCD are supplementary. Hence angle BAC = 122,6
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2) Arc length of minor arc BC =
b) ARc length of minor arc = circumference -minor arc
= 18.713
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3) circumference = pi d =
Answer:
Step-by-step explanation:
We essentially need to solve for l; in other words, we must isolate it to one side.
First, notice that the term doesn't have any l terms in it, so we can just move this to the left side by subtracting both sides by
:
A - = 2lw
Now, the right side has 2lw, so we must divide both sides by 2w to isolate l:
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