Circles
The distance across a circle, going through the center
Diameter
What is the only kind of triangle that works for the Pythagorean Theorem?
A right triangle
What is the area of a rectangle with sides that measure 5 cm and 12 cm?
60 cm2
(length x width)
How many degrees are there in every triangle?
180
What kind of angles add up to 180 degrees?
Supplementary angles
The distance all the way around a circle
Circumference
What is the formula for the Pythagorean Theorem?
a2 + b2 = c2
What is the area of a square with sides that measure 13 in.?
169 in2
What is the formula to find the area of a triangle?
1/2bh
(1/2 x base x height)
What kind of angles add up to 90 degrees?
Complementary angles
When you take the circumference of any circle and divide it by its diameter, what number do you always get?
Pi (3.14)
What do we call the long side of a right triangle ("c")?
The hypotenuse
What is the area of a circle with a radius of 7 cm?
(use 3.14 for Pi)
153.86 cm2
(7 x 7 x 3.14)
How do you find the perimeter of a triangle?
Add up the length of all of the sides.
Two angles are supplementary. If the first angle is 105 degrees, how many degrees is the second angle?
75 degrees
What is the term for a line that goes halfway across the circle from the center? (this is also the same as half the diameter)
Radius
If the legs of a right triangle are 4 cm and 3 cm, what is the length of c?
5 cm
Which has a larger area - a square with sides that are 15 inches or a rectangle with sides that are 20 inches and 10 inches?
The square (225 square inches - the area of the rectangle is 200 square inches)
Two angles in a triangle are 45 degrees and 80 degrees. How many degrees is the third angle?
55 degrees
Two angles are complementary. If the first angle is 22 degrees, how many degrees is the second angle?
68 degrees
What is the formula to find the area of a circle?
Pi x r2
(3.14 x r x r)
If one of the legs of a right triangle is 6 in. and the hypotenuse is 10 in., what is the length of the other leg?
8 in.
A football field is 100 yards long and 53 yards wide. What is the area of the football field?
5300 square yards
Bonus: what kind of triangle has three sides that have the same length and all 3 angles are the same?
Equilateral triangle
There are THREE angles that are supplementary. The first angle is 85 degrees and the second angle measures 23 degrees, what is the measure of the third angle?
72 degrees