Sewanhaka High School
Math 8
Mrs. Lidowsky, Principal
Mr. Long, Teacher
Class:______________
Date:________________________
Name:__________________
H.W. #69C: Ditto
DO-NOW #69C: Answer the following questions:
1) Classify the triangle based on its measurements.
3 in
3 in
3 in
2) Bill scored an 87%, 76%, 78%, 71%, and 78% on 3) Define the following:
the first four tests this marking period. What is the
a) right angle:
mean, mode, and median for this set?
b) obtuse angle:
c) acute angle:
Topic: Geometry with Algebra
Main Idea: Classifying Triangles by its angles
Aim:
RECALL
Construct an equilateral triangle with your ruler
(and/or protractor). Measure the interior angle at
each vertex.
After measuring all sets of angles what can you
conclude about the 3 interior angles of a triangle?
If we can classify triangles by the measures of
their sides, what is another way to classify
triangle?
NOTES
How would we describe an acute triangle? Draw
one with the use of your ruler and protractor.
How would we describe an obtuse triangle? Draw
one with the use of your ruler and protractor.
How would we describe an right triangle? Draw
one with the use of your ruler and protractor.
Drill:
Classifying Triangles 2 worksheet.
Summary:
Lesson Plan 69C Worksheet. Measure each triangle with the use of a
ruler. Identify each triangle as scalene, equilateral, or isosceles. Then
find the measure of each interior angle of each triangle with the use of a
protractor. Identify each triangle also as acute, right, or obtuse.