Angles
(Not to be confused with angels)
(Not to be confused with angels)
This angle is less than 90 degrees but definitely more than 0 degrees
What is an acute angle?
What is the corresponding angle of angle 4?
Angle 8
This is a polygon of four sides
What is a quadrilateral?
This is a triangle in which all sides and angles are equal
What is an equilateral triangle?
An angle between 90 and 180 degrees
What is an obtuse angle?
Angle 3 and Angle 5 are pairs of . . .
Supplementary angles or interior angles
A polygon with all sides and angles equal
What is a regular polygon?
This triangle is one with two equal sides
What is an isosceles triangle?
Either of two equal and opposite angles formed by the intersection of two straight lines
What are vertical angles?
If Angle 5 is 120 degrees, what is the measure of angle 2?
60 degrees
This solid figure is bounded by plane polygons or faces
What is a polyhedron?
A triangle with no two sides of equal length
What is a scalene triangle?
Two angles whose sum is a right triangle (90 degrees)
What are complementary angles?
Refer to the diagram on the board
61 degrees
A polyhedron with two congruent and parallel faces
What is a prism?
This is known as the line segment extending from any vertex of a triangle perpendicular to the line containing the opposite side
What is the altitude of a triangle?
Two angles whose sum is a straight angle (180 degrees)
What are supplementary angles?
Refer to the diagram on the board. Find the value of x and the measure of the angle 2.
x = 35
71 degrees
This is known as the extent of a 2-dimensional surface enclosed within a boundary
What is surface area?
This branch of study studies the relationships between the side lengths and angles of triangles
What is trigonometry?