Circle
Missing Angles
Scale Factor
Triangles
1
What is the area of the circle?
Area is the inside of the circle.
1
_______ angles are directly opposite of each other. We use
cong
to show that they are __________. (Must get both correct)
Vertical and congruent or equal
1
A scale factor of 1.5 would do what to the figure?
Increase size
1
The sum of the two smaller sides must be __________ than the size of the larger size to make a triangle.
greater
2
What is the formula for circumference?
C=πd
2
Find angle a
112
2
A scale factor of 30 % would do what to the figure.
Decrease Size
2
Unique triangle, more than one triangle, or no triangle?
2cm, 4cm and 5 cm
Unique triangle
3
Find the circumference of a circle with a diameter of 4cm. Leave answer in π.
C=4πcm
3
Find angle c.
68
3
What scale factor would not change the figure? Give both the number and the perentage.
1 or 100%
3
Unique triangle, more than one triangle, or no triangle?
40°, 60°, 80°
More than one triangle
4
Find area of the circle with radius of 5cm. Leave answer in π.
A=25πcm2
4
Find the missing angle.
32
4
Scale factor of 3. What would the new shape be?
15ft by 45 ft
4
Unique triangle, more than one triangle, or no triangle?
31 cm, 32 cm, and 70 cm
No Triangle
5
Find the area of the circle. Leave answer in π.
A=9πin2
5
Find the missing angle.
56
5
Scale factor of 20%. What would the new figure look like?
1ft by 3ft
5
Unique triangle, more than one triangle, or no triangle?
54°, 85°, 78°
No Triangle