The Law of Cosines
Authored by Anthony Clark
Mathematics
12th Grade
CCSS covered
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Use Law of Cosines to find angle T
62.2°
53.1°
59.5°
64.7°
Tags
CCSS.HSG.SRT.D.10
CCSS.HSG.SRT.D.11
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following formulas shows the Law of Cosines?
c2 = a2 + b2 - 4ac + cosA
c2 = a2 - b2 - 2abcosC
c2 = a2 + b2 - 2abcosC
(cos A)/a = (cos B)/b
Tags
CCSS.HSG.SRT.D.10
CCSS.HSG.SRT.D.11
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find QR
34.7 km
2.2 km
13.74
31.1 km
Tags
CCSS.HSG.SRT.D.10
CCSS.HSG.SRT.D.11
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find BC
A
B
C
D
Tags
CCSS.HSG.SRT.D.10
CCSS.HSG.SRT.D.11
5.
DRAG AND DROP QUESTION
1 min • 1 pt
Which Law would you use? (a)
Law of Sines
Law of Cosines
Tags
CCSS.HSG.SRT.D.10
CCSS.HSG.SRT.D.11
6.
DRAG AND DROP QUESTION
1 min • 1 pt
(a) 4. Which law should I use for the given triangle?
Law of Sines AFTER testing for #of Triangles
Law of Sines then switch to Law of Cosines
Law of Sines only
None, use Right Triangle Trig
Law of Cosines only
Law of Cosines then switch to Law of Sines
Tags
CCSS.HSG.SRT.D.10
CCSS.HSG.SRT.D.11
7.
DRAG AND DROP QUESTION
1 min • 1 pt
Which law should I use for the given triangle?
Law of Sines AFTER testing for #of Triangles
Law of Sines then switch to Law of Cosines
Law of Sines only
None, use Right Triangle Trig
Law of Cosines only
Law of Cosines then switch to Law of Sines
Tags
CCSS.HSG.SRT.D.10
CCSS.HSG.SRT.D.11
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