3 years ago

Determine which postulate or theorem can be used to probe ABC = DCB

Mathematics

1 answer:

Alona [7]3 years ago

3 0

Answer:

do u need answer or for me to show u how to do it?

Step-by-step explanation:

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AB is tangent to the circle at B. M∠A=40 and mBC=130. <br> a. Find x <br> b. Find y

soldi70 [24.7K]

The values for x and y are respectively given as

x = 50
y= 90

This is further explained below.

<h3>What is the values for x and y ?</h3>

Generally, the equation for secent is mathematically given as

$secent = \frac{big arc - small arc}{2}$

Therefore

$40 = \frac{130-x}{2}$

80 = 130-x

x = 50

b) To Solve for y Now we find a measure of arc CD

ArcCD = 360-130-50

ArcCD = 180

In conclusion,(1/2) of the arc measure is equal to the angle that is on and inside a circle.

y = 180/2

y= 90