Download Classifying Triangles 8-6 and 8-7 - Net Start Class

Name: ____________________________
Period: ___________
Classifying Triangles 8-6 and 8-7
Grade 7 Math
Klein ISD 2012 - 2013
I. Use the triangular dot paper.
1. An equilateral triangle has three equal sides.
All equilateral triangles are similar. Find the
equilateral triangles.
______6 Which of the following triangles CANNOT have one
right angle?
A Equilateral triangle
B Scalene triangle
C Right triangle
D Isosceles triangle
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2. Name triangle E with TWO names.
_____________
______________
3. Triangles with these angles are similar to
triangle E. Which triangles are similar to E?
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4. Name triangle A with TWO names.
_____________
______________
5. Triangles with these angles are similar to
triangle A. Which triangles are similar to A?
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______7 Taylor drew a triangle. Two sides of his triangle were
each 4 centimeters. One angle was exactly 90°. Which best
describes Taylor’s triangle?
A Equilateral and right
B Isosceles and right
C Scalene and right
D Acute and right
______8 The measure of the largest angle in an acute triangle is
A less than 90o
B greater than 90o
C equal to the sum of the measures of the other 2 angles
D greater than the sum of the measures of the other 2 angles
______9 According to the diagram, how would you
find the measure of ∡B?
______15 An isosceles triangle has 2 angles measuring 45°
each. Which description best describes the triangle?
A It is an acute triangle because a 45° angle is smaller than a
right angle.
B It is an obtuse triangle because 180 – 45° = 135°
C It is a right triangle because 180° - 90° = 90°
D It is a scalene triangle because none of the angles are
congruent.
A Subtract 90° from 180° and then divide the
difference by two
B Subtract 180° from the sum of 45° and 90°
C Add 45° and 45° and subtract from 180°
D Subtract 180° from the sum of 45° and 45°
______10 A triangle has three congruent angles.
What is the measure of each angle?
A 50°
B 60°
C 75°
D 100°
______11 Juliana sewed a triangle on an apron for
homemaking class. The three sides of the triangle
measure 3 inches, 4 inches, and 5 inches. Which best
describes the triangle based on its side
measurements?
II. Use the triangular dot paper above.
16. Triangles can be classified by angles or
sides. Find each triangle in the figure.
A Equilateral
B Isosceles
a. right __________________________
C Scalene
D Acute
b. acute _________________________
The figure shows the Oak Creek trail, which is shaped
like a triangle.
c. obtuse ________________________
d. isosceles ______________________
e. equilateral _____________________
f. scalene _______________________
17. Draw segment BD. Describe ⦟ABD.
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______12 Classify the triangle by its side.
18. Draw ∆KHJ. Describe ∆EHK.
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______13 Classify the triangle by its angles.
______14 Find the missing angle.
19. Draw segment XZ. Describe the triangles.
a. ∆WXZ ________________________
b. ∆XZY ________________________