Lesson 7.3

If the diameter of a circle is 15 units in length, how long is the circle's

radius?(answer in a decimal)

If GJ=8, find JH.

If JH=11 cm, find GJ.

If AB=15, find DC.

Find the value of x.

What is segment BC?

• a) center• b) radius• c) chord• d) secant• e) tangent• f) diameter

What is segment QP?

• a) center• b) radius• c) chord• d) secant• e) tangent• f) diameter

What is Q?

• a) center• b) radius• c) chord• d) secant• e) tangent• f) diameter

What is EF?

• a) center

• b) radius

• c) chord

• d) secant

• e) tangent

• f) diameter

What is FL?

• a) center

• b) radius

• c) chord

• d) secant

• e) tangent

• f) diameter

Notes

• Tangent Circles- Circles that are tangent to the same line at the same point.

• externally tangent internally tangent

• C-66 A tangent to a circle is perpendicular to the radius drawn to the point of tangency.

• C-67 Tangent segments to a circle from a point outside the circle are congruent.

Circumscribed vs. Inscribed

Sketch a square inscribed in a circle.

Sketch a square circumscribed about a circle.

Given that AB and AC are tangent segments, find the value of x.

64o

xy

zA

B

C

O

Given that AB and AC are tangent segments, find the value of x.

64o

xy

zA

B

C

O

Given that AB and AC are tangent segments, find the value of x.

64o

xy

zA

B

C

O

Homework

7.3

#1-6, 8-10, 18, 20