Section 5.4 ­ Solving for a Missing Side
September 06, 2016
5­4 Solving for missing sides in a triangle
SOH ­ CAH ­ TOA
We can use our trig ratios to solve for missing sides of a triangle.
Once again, the first place we start is with the angle (given).
1. Find x
2. Find y
14 inches
12 inches
35°
x
y
50°
22.5 inches
39
o
z
17.9 inches
4. Find W
3. Find Z
45o
w
Pre­Calculus
Section 5.4 ­ Solving for a Missing Side
September 06, 2016
5. Find r and p
degrees: 2nd, APPS, 1
minutes: 2nd, APPS, 2
seconds: ALPHA, +
r
40 feet
52o15'
p
6. Find c and d
degrees: 2nd, APPS, 1
minutes: 2nd, APPS, 2
seconds: ALPHA, +
57 cm
c
27o 45' 45''
d
Pre­Calculus
Section 5.4 ­ Solving for a Missing Side
September 06, 2016
7. A regular pentagon is inscribed in a circle with diameter 8.34 centimeters. The apothem of a regular polygon is the measure of a line segment from the center of the polygon to the midpoint of one of its sides. Find the apothem (a) of the pentagon. Pre­Calculus