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Ket [755]
3 years ago
12

∆ABC has the points A(1, 7), B(-2, 2), and C(4, 2) as its vertices.

Mathematics
1 answer:
Lesechka [4]3 years ago
3 0
1. D 6
2. B isosceles
3. C right scalene
4. B 5

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What is the measure of EBC ?<br> ___ degrees
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Answer:

The measure of arc EBC is 220°

Step-by-step explanation:

step 1

Find out the measure of angle COB

we know that

m∠COB+m∠DOC=90°  -----> given problem

we have that

m∠DOC=m arc DC -----> by central angle

m arc DC=50°

so

m∠DOC=50°

Find m∠COB

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step 2

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m arc BC=m∠COB -----> by central angle

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step 3

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m arc EBC=m arc EB+m arc BC

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so

m arc EBC=180°+40°=220°

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