Geometry
Name ____________________
Unit 4 Review for Unit Test Triangles Íntro
Date ___________________
WARM UP
Find the measure of each angle indicated.
1.
65
2.
?
155
60
?
57
3. Solve for x.
30
(8 + 6x)
(4x + 2)
Two sides of a triangle have the following measures. Find the range of possible measures for the third side.
4. 9 and 5
5. 11 and 14
6. Order the angles of the triangle from least to greatest.
16 y d
L
14 y d
J
18 y d
K
7. Compare the two quantities using <, >, or =.
C
AB _________ CB
D
92
88
A
B
REVIEW NOTES:
In a scalene triangle, _______sides are equal
In a right triangle, only _____ angle is a _____ angle.
In a equilateral triangle, ______ sides are equal. It is also called ________________.
Each angle in an equilateral triangle has a measure of __________.
In an isosceles triangle, _______ sides are equal. They are called the ______. The
third side is called the ___________. The _______ angles are _______.
Can a triangle be obtuse and right at the same time? ________ How do you know?
Can a triangle be acute and equilateral at the same time? _______ How do you
know?
The interior angles of a triangle add to ____________.
Scalene
The exterior angle of a triangle can be found by
Isosceles
Geometry Intro to Triangles Review for Unit Test (con’t)
Use Inequalities in One and Two Triangles
1. List sides from least to greatest
2. List angles from least to greatest
Given a length make an isosceles triangle and a scalene triangle.
Triangle Inequality Theorem: The ______ of the __________ of any ______ sides of a
triangle is _________________ than the ______________ of the third side.
Hinge Theorem and Converse of the Hinge Theorem: Given two triangles that have
corresponding congruent sides and an included angle, you can tell which of the third
side of the triangles will be larger than the other.