Select all the correct answers.

consider the line shown on the graph. select all pairs of triangles that could be used to show the slope of the line is the same between any two points on the line.

triangle 1 and triangle 3
triangle 2 and triangle 4
triangle 4 and triangle 5
triangle 3 and triangle 4
triangle 1 and triangle 5
triangle 2 and triangle 5

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.

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

you are playing an adventure game on your computer. you come across a troll who won't let you pass and there is no other way to get to the other side of the river except over the bridge he is guarding.

the troll is a nerd. he takes great delight in watching people struggle with his problems. very few get them. he only gives you one chance and then he changes the puzzle. you have to solve this one.

before you are four blocks. they are numbered 11,6, -7,21.

he tells that the answer he wants is minus and between -1 and - 2. you can use +, -, ×, ÷   ( and ) as many times as you like or no times at all. you don't like the way he's looking at you, but you need to cross the bridge. what do you do?