Download Name: Algebra III – Trigonometry Guided Notes

Name: __________________________
Algebra III – Trigonometry Guided Notes - Special Right Triangles
45-45-90 Guided Notes
Construct an isosceles right triangle. Label the congruent sides and angle measures.
If you know one side is x, find the other two sides.
IF YOU KNOW A LEG
a
b
10
c
a
b
c
60
3
2
9
30
IF YOU KNOW THE HYPOTENUSE
4
9
3 6
Name: ________________________________
30-60-90 Triangle Guided Notes
Draw and equilateral triangle with side lengths of an even number. Then draw an altitude. Redraw the
right triangle, label the angles and find all 3 sides of that triangle.
If you know the small leg
a
7
2
5
5
b
c
If you know the hypotenuse
a
b
c
16
3
11
7
If you know the big leg
a
b
9
7
13
22
c