Find the length of the midsegment of the trapezoid?

Please show work and explain how you got the answers..

Krishnamurthy2021-03-29T23:59:19Z

 The length of the midsegment of the trapezoid:
 The length of the midsegment of trapezoid is 
 half the sum of the lengths of the two parallel sides. 
 3).  19 
 4). 73

Ash2021-03-29T23:31:38Z

3. MN = (21+17/)2 = 38/2 = 19

4. MN = (82+64)/2 = 146/2 = 73