Here is a list of numbers. -45
-21
-16
12
33
40
a) Write down two numbers from the list that add up to -9.
b) Write down two numbers from the list that have a difference of 29.
c) Work out the sum of all the numbers in the list.
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(a): -21 and 12.

(b): -45 and -16

(c): 3.

Step-by-step explanation:

(a): -21 + 12 = -9.

(b): -45 - -16 = 29.

(c): -45 + -21 + -16 + 12 + 33 + 40 = 3.

answer: the resulting cross section is a rectangle. solution: a plane parallel to the base of a triangular prism will intersect a cross section that is the same shape as its bases. so the cross section is a triangle.

step-by-step explanation:

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.