# If the coordinates of A= (0,0), B= (3,-3) and C= (-2,-8), help me to answer below questions?

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a) Prove that ABC is a right angle triangle

b)Find the value of BAC and the value of BCA.Then, prove that BAC + BCA = 90 degree

Thank you! :)

a) Prove that ABC is a right angle triangle

b)Find the value of BAC and the value of BCA.Then, prove that BAC + BCA = 90 degree

Thank you! :)

##### 2 Answers

Refer to the Explanation Section.

#### Explanation:

**Part (a) :-**

**Slope** of

**Slope** of

**Slope** of

Since,

Also, as

From

right-angled

This proves

**Part (b):-**

To find the measure of

angle btwn. lines

resp.

Similarly,

This proves

**Enjoy Maths.!**

Please see below.

#### Explanation:

In the triangle we have

As

and hence