4.G.1-3 Line & Shapes
Lines that will never intersect are called________.
Parallel Lines
I have 3 angles that are less than 90 degrees.
Acute Triangle
The total number of degrees in a full circle.
360°
Draw an example of an acute angle.
A angle that is less than 90°.
Look at the drawing. Angle ABC is a right angle. What is the measure, in degrees, of angle X?
60°
Lines that intersect and form 90 degree angles.
Perpendicular Lines
I have one angle that is 90 degree.
Right Triangle
The number of degrees in half of a circle.
180°
Draw an example of a right angle.
An angle that is exactly 90°.
Look at the drawing. Angle XYZ is a straight angle. Angle XYW measures 70°. What is the measure, in degrees, of x?
110°
Lines that pass through the same point but DO NOT form 90 degree angles.
Intersecting Lines
Equilateral Triangle
The number of degrees in 1/4 turn.
90°
Draw an example of an obtuse angle.
An angle that is greater than 90° and less than 180°.
Look at the drawing. Angle LMN measures 120°. Angle LMO measures 20°. What is the measure, in degrees, of x?
100°
A type of line that can be drawn across a figure to create matching parts.
Line of Symmetry
I am a triangle with 0 equal sides.
Scalene Triangle
The number of degrees in 3/4 of a turn.
270°
Draw a straight angle.
An angle that is exactly 180°.
Look at the drawing. Angle DEF measures 45°. Angle DEG measures 15°. What is the measure, in degrees, of x?
30°
This shape has an INFINITE number of lines of symmetry.
Circle
The length of 2 sides of my triangle are the same.
Isosceles Triangle
The measure, in degrees, that measures 1/360 of a circle.
1°
To the best of your ability, sketch an angle that is about 45°. Then name what type of angle it is.
An acute angle is an angle that measures less than 90°.
Look at the drawing. Angle QRT measure 80°. Angle TRS measures 40°. What is the measure, in degrees, of angle QRS?
120°