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3 years ago

Pls help me I need help

Mathematics

1 answer:

AVprozaik [17]3 years ago

7 0

Answer:

Step-by-step explanation:

Remark

Triangle BAC is isosceles. It has 2 sides that are both radii of the circle. I assume that C is the center of the circle.

Givens

AC = BC Both of these are radii.

<BCD = 20o Given

<A and <B are equal Both are opposite a radii of the circle

C is the circle's center Assumed otherwise we can't do it.

Solution

<BCD is an exterior angle of Triangle ACB It's on the same straight line as D and A

The sum of 2 remote interior angles = the sum of the exterior angle.

BAC = ABC Stated above

BAC + ABC = 20 Stated right above.

2BAD = 20

BAD = 20/2

BAD = 10

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