Sewanhaka High School
Math 8
Per:______________
Name:___________________________________
Mrs. Lidowsky, Principal
Mr. Long, Teacher
Date:________________________
H.W. #63: Ditto
DO-NOW #63: Answer the following questions:
1) Given ∆ABC, draw a diagram showing how you could open it into a straight line.
B
2) Gina runs at a constant rate of 7 meters per
second. At the beginning of a race, she is 350
meters from the finish line. How long will it take
Gina to reach the finish line?
3) Evaluate: 4-2 =
A
C
Topic: Geometry
Main Idea: Finding the angles of a triangle
Aim:
RECALL
3. What kind of angle is formed by <1, <5, and <3?
Write an equation representing the relationship between
the 3 angles.
4. Use the information from Exercises 1, 2, and 3 to
draw a conclusion about the sum of the measures of the
angles of ∆ABC. Explain your reasoning.
Show that m<3 + m<4 +
m<5 = 180° if line l and m
are parallel lines and t1 and t2
are transversals.
NOTES
Based on the picture to the
left, find the measure of
<BAD.
What can you say about the measure of exterior angle
at A?
Name the exterior
angle of the triangle
and find the measure
of the exterior angle.
Drill: Answer the following questions. Show work.
1) In triangle PQR, m<P:m<Q = 2:3 and the measure 2) Name the exterior angle of the triangle and find the
measure of <TUS.
of an exterior angle at R is 150˚. Draw and label a
diagram and find the value of x, m<P, m<Q, and m<R.
Summary:
If time: 3) In triangle DEF, m<D = 80˚, and the measure of an exterior angle at E is 3 times the measure of <F.
Find the measure of <F by drawing and labeling a diagram.