Question

Triangle IJK has vertices given by I(4,3) , J( 7, 6) , and K( 13, 3). Triangle is reflected in x-axis and then dilated by a scale -factor of 1/3 , What is the length of I'K' in resulting figure

Answer 1

3

Explanation:

The length of IK is 9.

Reflecting across the x axis is a rigid motion, so the length is unchanged.

Dilating by a factor of 1/3, we get the final length to be (9)(1/3), which is equal to 3.