RSTU is a quadrilateral with vertices R(–3, –3), S(5, 1), T(10, –2), U(–4, –9). Determine whether RSTU is an isosceles trapezoid. Explain.

Question

isosceles;  and 

not isosceles;  and 

isosceles;  and 

not isosceles;  and 

Provided answers

Answer 1

Draw the figure on graph paper and the answer will be obvious.

Check the slope of the line through R and S versus the slope of the line through T and U.