The top of a display counter at a store is in the shape of a trapezoid . the lengths of the front back and with in feet of the top of the display counter a. 40 square b. 50 square c.30 square feet d. 66 square feet

square feet

Step-by-step explanation:

Here we have , the top of a display counter at a store is in the shape of a trapezoid . the lengths of the front back and with in feet of the top of the display counter . Complete question is given below , We need to find area of trapezoid with dimensions :

Area of trapezoid =

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Therefore, square feet.

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle