Solving Right Triangles
equilateral triangle
A triangle with three congruent sides
adjacent side
Beside the angle
opposite side
On the opposite side of the triangle
35.5
Solve for the angle measure to the nearest 1/10th of a degree.
35.6
Solve for the angle measure to the nearest 1/10th of a degree.
35.9
Solve for the angle measure to the nearest 1/10th of a degree.
41.2
Solve for the angle measure to the nearest 1/10th of a degree.
43.9
Solve for the angle measure to the nearest 1/10th of a degree.
44.4
Solve for the angle measure to the nearest 1/10th of a degree.
49.7
Solve for the angle measure to the nearest 1/10th of a degree.
50.9
Solve for the angle measure to the nearest 1/10th of a degree.
64.3
Solve for the angle measure to the nearest 1/10th of a degree.
66.6
Solve for the angle measure to the nearest 1/10th of a degree.
70.3
Solve for the angle measure to the nearest 1/10th of a degree.
3/5
sin A
4/5
sin B
20/29
sin F
21/29
sin Y
12/13
sin Z
3/4
tan A
4/3
tan B
5/12
tan E
20/21
tan F
21/20
tan Y
12/5
tan Z
angle of elevation
the angle formed by a horizontal line and a line of sight to a point above
angle of depression
the angle formed by a horizontal line and a line of sight to a point below
theta
the symbol θ which is commonly used as a variable for an angle
complementary angles
two angles whose measures have a sum of 90°
acute angle
an angle that measures greater than 0° but less than 90°
pythagorean theorem
a² + b² = c² (in a right triangle with legs a and b and hypotenuse c)
4/5
cos A
3/5
cos B
12/13
cos E
21/29
cos F
20/29
cos Y
5/13
cos Z
cosine
in a right triangle, the ratio of the adjacent side of an angle to the hypotenuse
tangent
in a right triangle, the ratio of the opposite side of an acute angle to the adjacent side of the acute angle
sine
in a right triangle, the ratio of the opposite side of an angle to the hypotenuse
leg of a right triangle
one of the two sides of a right triangle that form the right angle
trigonometry
a branch of mathematics studying the relationships between angles and sides of triangles and other figures
trigonometric ratio
a ratio of two sides of a right triangle
right triangle
a triangle with one 90° angle
