Triangles
Formulas and Fun!
Circles
100
How many degrees are in a triangle?
180
100
What does congruent mean?
the same!
100
What is the radius?
Half the diameter
200
What does the little square in a shape mean?
90 Degrees
200
If the diameter of a circle is in inches, how would you properly label both the circumference and area?
C = in
A =in2
200
If I have a circle with the radius of 6cm, what is it's circumference?
Draw a picture and label for full credit!
C=37.68 in
300
Solve for x:
60
300
What does Pi equal?
3.14159...... We just use 3.14!
300
If I have a circle with a diameter of 14 in, what is it's area?
A=153.86 in2
400
Solve for x:
x=10
400
What is the area formula of a circle?
A = (Pi)r2
400
If I am building a fence around my pool, and my pool is 20 feet across, how much fencing do I need?
To get full points, please draw a picture, answer correctly and write which key words tell you what formula to use.
Circumference! (Fencing around!!)
C=62.80ft
500
If I have an equilateral triangle, what does each angle equal?
60 Degrees
500
What are BOTH circumference formulas for a circle?
C = (pi)d
C = 2(pi)d
500
Ms Romano wants to get a new rug for her classroom. She knows she has a spot that is 16 feet across that will fit the whole rug. How many square feet will the rug be?
Key words! Picture! Label!
A=200.96 in2