How do you work out the area of a triangle? ​

Ineed with number 17 i don’t get it at alll

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

Consider the triangle. which shows the order of the angles from smallest to largest? angle a, angle b, angle c angle b, angle a, angle c angle b, angle c, angle a angle c, angle a, angle b