1. Do-Now
Find the area of an equilateral triangle with side lengths of 26 ft.
Reflect the point (3, –9) in the line y = x and state the coordinates of the image formed.
Find the vertex and axis of symmetry of y = x + 8x – 2.

2. Review Circles & Triangles
Intersection of two chords in a circle
Central angle and it’s intercepted arc
Find the measure of an arc given equal chord lengths
Tangent & secant – intersect outside the circle
Given two tangents intersecting outside the circle, find the measure of a base angle of the triangle formed
Can three lengths be the sides of a triangle?
Midsegment Theorem

3. Find the measure of major arc AB.
Circles Part I
Find x. xº
100º
120º
60º
Find the measure of major arc AB. A
60º B A B C xº
100º
Find x.

4. Review Circles & Triangles
Intersection of two chords in a circle
Central angle and it’s intercepted arc
Find the measure of an arc given equal chord lengths
Tangent & secant – intersect outside the circle
Given two tangents intersecting outside the circle, find the measure of a base angle of the triangle formed
Can three lengths be the sides of a triangle?
Midsegment Theorem  

5. Circles Part II
Find x. 9 6 x
Find the measure of angle ABC. A B C
300

6. Review Circles & Triangles
Intersection of two chords in a circle
Central angle and it’s intercepted arc
Find the measure of an arc given equal chord lengths
Tangent & secant – intersect outside the circle
Given two tangents intersecting outside the circle, find the measure of a base angle of the triangle formed
Can three lengths be the sides of a triangle?
Midsegment Theorem    

7. Triangles
Can sides with lengths of 3m, 4m, and 6m represent the sides of a triangle? A B C D E
DC is the midsegment of triangle AEB. If DC = 8 and AB = 5x + 6, what is the value of x?