Right Angles
Vocabulary
Angle Basics
Complementary Angles
Supplementary Angles
100
The measure (in degrees) of a right angle
What is 90 degrees
100

A _________ has no dimension.   It is usually represented by a small dot and named by a capital letter.

point

100

The ___  ___ is the small angle which is less than 90°.

acute angle

100
Complementary angles add up to be ______.
What is 90º?
100
Supplementary angles add up to be _________.
What is 180º?
200
The type of lines that form a right angle
What are perpendicular lines?
200

A _______ extends in two dimensions.  It is named by a capital script letter or 3 non-collinear points.

plane

200

In geometry and trigonometry, a ___ ___ is an angle of exactly 90°.

right angle

200
Two complementary angles will form a _______ angle.
What is a right angle?
200
Supplementary angles also form a __________.
What is a linear pair or a straight line or a line segment?
300
This special shape has only one right angle
What is a triangle?
300

A _________ is usually represented by a straight line with two endpoints.  It has no arrowheads to indicate that it has a fixed length.

line segment

300

An obtuse angle has a measurement greater than ___ degrees but less than ___ degrees.

90°  < angle < 180°

300
If angle T and angle V are complementary angles, and the measure of angle T is 40º, what is the measure of angle V?
What is 50º?
300
If angle T and angle V are supplementary angles, and the measure of angle T is 45º, what is the measure of angle V?
What is 135º?
400
This shape has four right angles and only opposite sides are congruent
What is a rectangle?
400

__________ are points that lie on the same line.

Collinear points

400

In Math, a straight angle is an angle equal to _____. It is called straight because it appears as a straight line.

180°

400
If angle A and angle B are complementary angles, and the measure of angle A is 35º, what is the measure of angle B?
What is 55º?
400
If angle K and angle L are supplementary angles, and the measure of angle L is 105º, what is the measure of angle K?
What is 75º?
500
This shape has four right angles and all sides are congruent
What is a square?
500

 ___________ are points that lie on the same plane.

Coplanar points

500

A point where lines meet to form an angle.

The vertex

500
If angle C and angle D are complementary angles, and the measure of angle C = (x+5)º measure of angle D= (2x+4)º Find the measure of angle C.
What is 32º ? x+5+2x+4=90 3x=81 x=27 C= 27+5 --> 32
500
If angle B and angle C are supplementary angles, and the measure of angle B = (3x+1)º measure of angle C= (x+19)º Find the measure of angle C.
What is 59º? 3x+1+x+19=180 4x=160 x=40 C=40+19 --> 59
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