Geometry Basics
A pair of adjacent supplementary angles
Linear pair
Will the lengths of 7.3 cm, 5 cm and 2.1 form a triangle? Yes or no?
No, they will NOT form a triangle because the sum of the two shortest sides is less than the third side.
When triangle NED is congruent to triangle RWO, this is the angle that corresponds to angle R
Angle N
A parallelogram with four right angles
Either a square or a rectangle
The exact area of a circle whose circumference is 20 inches
10.1
Lines that lie in the same plane but never intersect
Parallel Lines
The measure of a base angle in an isosceles triangle whose vertex angle is 37.5 degrees
(180-37.5)/2
71.25 degrees
A polygon with all congruent segments and congruent angles
Regular Polygon
A quadrilateral that is both equiangular and equilateral
Square
The diameter of a circle if the circle's circumference is 75 pi inches
75 inches
The converse of the conditional:
"If you don't water your flowers then they will wilt"
"If your flowers are wilted then you didn't water them"
How do you know that a triangle with lengths of 5.4”, 7.2” and 9” is definitely a right triangle?
What is because 5.4^2 + 7.2^2 = 9^2 ?
The sum of the interior angles of an 8-sided polygon
1080 degrees -- (n-2)(180) or 6*180
The value of x when the four angles of a quadrilateral are given by:
2x, x-5, 3x-2, and 5x+19
x = 31.6
If a line is tangent to a circle, this is the measure of the angle at the point of tangency formed with the radius of the circle at that point.
90 degrees
This is the distance between (-9, 3) and (1, -5)
The square root of 164 or about 12.8
The EXACT length of a leg if a right triangle's other two sides measure 12 cm and 18 cm
The square root of 180 or 13.4 cm
The slope of a line perpendicular to a line with slope of 5/3
Slope of -3/5
Slopes are opposite reciprocals of each other
What is the vocabulary word that describes when a line cuts a segment exactly in half.
The line _________ the segment.
The location of the vertex of any central angle in a circle
The center of the circle
Lines that intersect and form a 90 degree angle
Perpendicular Lines
Draw an example of the midsegment of a triangle
Pretty pictures
The volume of a triangular pyramid with height of 36 in whose base is a right triangle with dimensions of 6 in, 8 in and 10 in
(hint: which sides of the triangular base will you use to find the area of the base?)
what is volume of 288 cu. inches
area of base is 1/2 of 6*8 or 24. then volume is 1/3 * 24 * 36
Two rectangles are similar.
One rectangle has a length of 5 and a width of 10.
The other rectangle has a length of 15. What is it's width?
30 - Multiply by 3 or cross-multiply and divide
What is the circumference of a circle with a radius of 4?
8pi or 12.6