Question

What is the area of the triangle if one of the vertices of the triangle is (0, 0) and the other two vertices are (2 , 2) and reflection of point (2 , 2) on Y-axis?

• A. 2
• B. 4
• C. 6
• D. 8

Answer 1

The correct option is B

4

Reflection of the point (2,2) on Y - axis is (-2,2)
So the triangle formed with (0,0),(2,2) and (-2,2) is having a base length of 4 units and altitude of 2 units.
Area of the triangle $=\frac{1}{2}\times b\times h=\frac{1}{2}\times 4\times 2=4$ square units.