All about Angles
Based on this image, I am a __________ angle. Draw what it looks like
What is an acute angle?
Using the information in the diagram, classify this triangle by its angles.
Right Triangle
Given a pre‑image at A(3, 2) and its image at A′(–3, 2), what two types of transformations could map A to A′
Translation x-6 (6 units to the left)
Reflection across the x-axis
90 degrees
Using the information in the diagram, classify this triangle by its sides
Scalene triangle
This type of line is represented by the equation
x = –2.
What is a vertical line?
These two adjacent angles add up to 90 degrees.
Complementary angles
Using the information in the diagram, completely classify this triangle by both its angles and its sides
Obtuse isosceles triangle
This transformation takes a figure to its new position as shown in the image; name the type of transformation and state its rule.
What is a 180 degree rotation
Supplementary angles add up to:
BONUS: This is another name for a pair of supplementary angles.
180 degrees
LINEAR PAIR
Given the triangle type and the angle shown in the diagram, what are the missing angle measurements?
50 degrees
This transformation takes a figure to its new position as shown in the image; name the type of transformation and state its rule.
90 degree clockwise rotation
If lines l and m are parallel and cut by a transversal, and Angle 1 measures 110°, use your knowledge of alternate interior and alternate exterior angles to determine the measures of the remaining angles.
<2: 70 <6:70
<3: 70 <7: 70
<4: 110 <8: 110
<5: 110
Based on the diagram, this is the measure of exterior angle a. What is the value of angle a?
exterior angle a: 160
Using rotational symmetry, this is the smallest angle of rotation that maps the figure onto itself. What is the angle found by using the formula 360 ÷ (order of rotation)?
120 degrees