body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

4. Inscribed Angles

Continue to next subchapter

Exercise 66 Page 748

Create a drawing and label the segments.

9/5

Practice makes perfect

Let's start by illustrating AC and its midpoint B.

A midpoint divides a segment into two equal parts. This means that AB and BC are congruent. Therefore, we can write the following expression. AC=AB+BC → AC=2AB Let's substitute the known measures and solve for s.

AC=2AB

AC= 40, AB= 10s+2

40=2( 10s+2)

▼

Solve for s

Multiply

40=20s+4

LHS-4=RHS-4

36=20s

Rearrange equation

20s=36

.LHS /20.=.RHS /20.

s=36/20

a/b=.a /9./.b /9.

s=9/5

Subchapter links

Exercises p.745-748