Building Blocks
(1.1–1.2)
(1.1–1.2)
What do we call a location in space with no dimension, no size or shape?
A point
What do we call a part of a line with and starting and ending point?
A segment
What tool do we use to measure an angle?
A protractor
A figure that is formed by 3 or more non-collinear segments called sides, each side intersects exactly 2 sides, one at each endpoint, how is called?
Polygon
A triangle with all equal sides is called what?
Equilateral triangle
What do we call a straight path that only can go in 2 directions, has 1 dimension and is infinite?
A line
2 segments with the same length are called what?
Congruent segments
What do we call an angle that measures exactly 90°?
Right angle
A polygon that if no line contains a side of it, contains a points in the interior, how its called?
Convex polygon
A triangle with exactly one right angle is called what?
Right triangle
What do we call a flat surface that can only go in 4 directions and has 2 dimensions?
A plane
What do we call the point that splits a segment into 2 congruent segments?
Midpoint
Two angles that add up to 90° are called what?
Complementary angles
A polygon with all sides and angles equal is called what?
Regular polygon
Two lines that never intersect are called what?
Parallel lines
What has one starting point and extends infinitely in one direction, no endpoint?
A ray
Use the midpoint formula to find the midpoint of a segment with endpoints
(2, 6) and (6, 10)
(4, 8)
What do we call the angles that their 2 sides form 2 opposite rays?
Vertical angles
What is the perimeter of a rectangle with sides 5 cm and 7 cm?
24 cm
Two lines that intersect at 90° are called what?
Perpendicular lines
True or False: Any three points determine exactly one plane?
True
What do we call a line or ray that intersects a segment exactly at its midpoint?
A segment bisector
True or False: Supplementary angles always form a straight line
True
What is the formula for the area of a triangle?
½ × base × height
Classify a triangle with sides 6 cm, 6 cm, and 8 cm
Isosceles triangle