# CBSE Class 10-Mathematics: Questions and Answers Chapter – 6 Triangles Part 9 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Question 3**:

In the given figure, and , find .

**Answer**:

In

Again in ,

**Question 4**:

Determine the length of an altitude of an equilateral triangle of side .

**Answer**:

In right triangles

In right (By Pythagoras Theorem)

**Question 5**:

In the given figure, if and . Then prove that .

**Answer**:

Again

Thus, in