How far the angles of a polygon add up to

Difficulty Standard · Set 1n7yct

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1
How many degrees do the inside angles of a triangle add up to?
2
How many degrees do the inside angles of a decagon add up to?
3
How many degrees do the inside angles of a decagon add up to?
4
How many degrees do the inside angles of a pentagon add up to?
5
How many degrees do the inside angles of a nonagon add up to?
6
How many degrees do the inside angles of a octagon add up to?
7
How many degrees do the inside angles of a pentagon add up to?
8
How many degrees do the inside angles of a hexagon add up to?
9
How many degrees do the inside angles of a heptagon add up to?
10
How many degrees do the inside angles of a nonagon add up to?
11
How many degrees do the inside angles of a heptagon add up to?
12
How many degrees do the inside angles of a pentagon add up to?
13
How many degrees do the inside angles of a nonagon add up to?
14
How many degrees do the inside angles of a hexagon add up to?
15
How many degrees do the inside angles of a octagon add up to?
16
How many degrees do the inside angles of a heptagon add up to?
17
How many degrees do the inside angles of a nonagon add up to?
18
How many degrees do the inside angles of a heptagon add up to?
19
How many degrees do the inside angles of a quadrilateral add up to?
20
How many degrees do the inside angles of a triangle add up to?

What is in this set

The numbers in this set run from 0 to 0.
Every problem in it will depend on how many sides the shape has.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 100% of the problems: the 2 was left out.
Answers are a whole number.

Drawing 240 problems from this page produced 8 different ones, 3% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 7 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.