Angles and Triangles
right angle
an angle that is exactly 90 degrees.
obtuse angle
an angle that is greater than 90 degrees and less than 180 degrees.
straight angle
an angle that measures exactly 180 degrees.
acute angle
angles that are greater than 0 degrees and less than 90 degrees
complementary angles
two Angles that add up to 90 degrees.
supplementary angles
two angles that add up to 180 degrees.
vertex
A point where two or more rays meet. (A corner)
Acute Triangle
A triangle where each angle is less than 90.
Isosceles Triangle
A triangle with 2 sides the same length and 2 equal angles.
Scalene Triangle
A triangle with 3 different side lengths
Equilateral Triangle
A triangle with 3 equal sides
right scalene
A triangle with a right angle AND a no sides are congruent/equal
right isosceles
A triangle with a right angle AND two sides are congruent/equal
acute scalene
A triangle with all acute angles AND no sides are congruent/equal
acute isosceles
A triangle with all acute angles AND two sides are congruent/equal
obtuse scalene
A triangle with an obtuse angle AND no sides are congruent/equal.
obtuse isosceles
A triangle with an obtuse angle AND two sides are congruent/equal
Obtuse Triangle
A triangle with one angle greater than 90
Right Triangle
A triangle with one right angle.
vertical angles
Angles opposite each other that are equal
adjacent angles
Angles that share a common ray(side).
acute equilateral
Classify the triangle
acute isosceles
Classify the triangle
acute scalene
Classify the triangle
obtuse isosceles
Classify the triangle
obtuse scalene
Classify the triangle
30 degrees
Find the missing angle measure
122 degrees
Find the value of ?
26 degrees
Find the value of ?
75 degrees
Find the value of ?
77 degrees
Find the value of ?
70 degrees
Find the value of a pair of supplementary angles if one angle measures 110 degrees
75 degrees
Find the value of x
x=14 degrees
Find the value of x
Perpendicular Lines
Lines that intersect to form right angles.
parallel lines
Lines that never intersect(meet).
1 degree
The measure of an angle is 179°. What is the measure of a supplementary angle?
63 degrees
The measure of an angle is 27°. What is the measure of a complementary angle?
136 degrees
The measure of an angle is 44°. What is the measure of a supplementary angle?
16 degrees
The measure of an angle is 74 °. What is the measure of a complementary angle?