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Angles
Inverse Operations
What do I do?
Triangles
Mad Mental Math
100
Acute
What is an angle of less than 90 deg.?
100
addition
What is subtraction?
100
3 x = 12
What is "divide both sides by 4?"
100
90 deg - 45 deg - 45 deg
What is a "right triangle?"
100
375 times 10
What is 3,750?
200
Obtuse
What is an angle of more than 90 deg.?
200
subtraction
What is addition?
200
19 = 7 + X
What is "subtract 7 from both sides?"
200
118 deg - 12 deg - 60 deg
What is an obtuse triangle?
200
75 divided by 5
What is 13?
300
right angle
What is an angle of exactly 90 deg.?
300
division
What is multiplication?
300
X / 5 = 30
What is "multiply both sides by 5?"
300
60 deg - 60 deg - 60 deg
What is an acute triangle?
300
10,000 times 3
What is 30,000?
400
a straight line
What is an angle of 180 deg. look like?
400
multiplication
What is division?
400
100 times X = 375
What is "divide both sides by 100?"
400
4 inches - 4 inches - 4 inches
What is an equilateral triangle?
400
9 X 7 + 7
What is 70?
500
an angle of 91 degrees
What is obtuse?
500
quotient
What is product?
500
100 divided by X = 10,372
What is "divide both sides by 100?"
500
6 mm - 6 mm - 10 mm
What is an isoceles triangle?
500
(525 + 14) X (632 x 0)
What is zero?