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## #1 2017-12-16 14:23:51

**shakeel123****Moderator**- Registered: 2017-09-21
- Posts: 50,796

### The side of a triangle are in a ratio of 4: 5 : 6. The smallest a...

# General Basic Math Exams Quizzes MCQs Quizzes Triangles Geometry Math Quiz

**Question:**

The side of a triangle are in a ratio of 4: 5 : 6. The smallest angle is:

**Option A):**

56°**Option B):**

69°**Option C):**

41°**Option D):**

82°

**Correct Answer is Option C):**

41°

**Explanation:**

Solution:

Use the law of cosines. Let the sides be 4, 5, and 6. 16 = 25 + 36 - 60 cos A.

Cos A = 45/60 = 3/4, which implies that A = Cos-1 (0.75) = 41o

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## 2017-12-16 14:23:51

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### Re: The side of a triangle are in a ratio of 4: 5 : 6. The smallest a...

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