Triangles
ALL triangles have an angle sum of?
180 degrees
What is the formula to find circumference of a circle?
C=πd
All 4-sided shapes have an angle sum of?
360 degrees
pi times radius squared
area of a circle
You can find the longest side of a triangle by....
Finding the largest angle and seeing which line is directly across (opposite) from it
A triangle has angles of 45 degrees, 45 degrees and 90 degrees. What type of triangle is this?
Right Isosceles
Pi is equal to 3.14. What information does Pi tell you?
How many times the diameter will fit around the edge of a circle (circumference)...3.14 times!
Which 4-sided shape can you not just use the formula L x W to find area?
Trapezoids!!!! 1/2 (b1 + b2)h
L x W
All 4-sided shapes except trapezoids
True or false: side lengths of 14, 5, 6 will form a triangle.
False. 5 + 6= 11 NOT GREATER than 14
A triangle has measures of 35 and 45. What is the third side?
100 degrees
What is the formula to find area of a circle?
Pi times radius squared...or π r2
Which shape has one set of parallel lines?
Trapezoids!
1/2 bh
Area of triangles
Side lengths of 4, 4, 8 will form a good triangle?
NO! HAS to be GREATER!!!
A triangle has angles of 40, 60 and 80. What type of triangle is this?
Acute Scalene
6 inches
A quadrilateral has two angles of 90 degrees and another of 25 degrees. What is the measure of the fourth angle?
155 degrees
1/2 (b1 + b2)h
Area of trapezoids
An 8-sided shape has an angle sum of...
1,080 degrees
What type of triangle has an angle sum that is NOT 180 degrees?
NONE OF THEM!!!! THEY ARE ALL 180 degrees!!!!
A circle has a radius of 6.25, what is the diameter?
12.5
What is the name of the 4-sided shape which the angle sum does NOT add up to be 360 degrees?
THERE ARE NONE!!!!!
C=πd
Circumference of a circle.
A circle has a diameter of 30 feet. What is the area?
706.5 feet squared