The Full 180
What is the sum of the interior angles of any triangle?
180°
What is the formula for the Pythagorean Theorem?
a2 + b2 = c2
What is the name of an angle that measures exactly 90°?
A Right Angle
Name any one of the three primary trigonometric functions used to solve right triangles.
Sine, Cosine, or Tangent
What is the perimeter of a square if one of its sides is 5 inches long?
20 inches
If a triangle has two angles that measure 60° each, what is the measure of the third angle?
60°
In the Pythagorean Theorem, what is the specific name for the longest side (side "c")?
The Hypotenuse
Complementary angles add up to how many degrees?
90°
Which trig ratio (Sine, Cosine, or Tangent) represents the ratio of the Adjacent side to the Hypotenuse?
Cosine
What is the specific name for a polygon that has exactly five sides?
A Pentagon
In a right triangle, if one angle is 90° and another is 40°, what is the measure of the third angle?
50°
In a right triangle, what are the two shorter sides (a and b) called?
Legs
What do you call a triangle where all three angles are equal?
Equiangular or Equilateral
If cos(x) = 4/5 and the hypotenuse of the triangle is 5, what is the length of the adjacent side?
4
What is the area of a triangle that has a base of 12cm and a height of 4cm?
24cm
Can a triangle have two right angles? Why or why not?
No; the angles would add up to more than 180°
A right triangle has legs of 6 and 8. What is the length of the hypotenuse?
10
If Line A and Line B are perpendicular, what is the measure of the angle formed where they intersect?
90°
If sin(x) = 3/5 and the hypotenuse of the triangle is 10, what is the length of the opposite side?
6
In geometry, if two shapes have the exact same shape and the exact same size, what is the mathematical term used to describe them?
Congruent
A triangle has an angle of 15° and another angle of 97°, what is the measure of the third angle?
68°
If a right triangle has a hypotenuse of 13 and one leg of 5, what is the length of the other leg?
12
What do we call two angles whose measures add up to exactly 180°?
Supplementary Angles
If the opposite side of a right triangle is 3 and the adjacent side is 4, what is the value of tan(x)?
3/4 or 0.75
What do we call two lines that are in the same plane but never intersect, no matter how far they are extended?
Parallel Lines