Page 874 - Algebra 1

Example
1
Classifying Angles
Classify each angle according to its measure.
a.
SOLUTION
b.
SOLUTION
This is an obtuse angle, because the angle measure is greater than 90° but less than 180°.
d.
SOLUTION
This is a right angle because the angle measure is equal to 90°.
This is a straight angle, because the figure is a line and the angle measures 180°.
c.
SOLUTION
This is an acute angle because the angle measure is less than 90°.
Classifying Triangles
Example
2
Classify each triangle according to its angle measures and side lengths.
a. >90° SOLUTION
The figure has one obtuse angle and at least 2 congruent sides. So, this is an obtuse isosceles triangle.
Skills Bank Practice
Classify each angle according to its measure.
a. b. c.
Classify each triangle according to its angle measures and side lengths. d. e. f.
b.
SOLUTION
The figure has one right angle and no congruent sides. So, this is a right scalene triangle.
Skills Bank 859
SKILLS BANK