×

# https://brilliant.org/practice/complementary-and-supplementary-angles/?p=4

Consider isosceles trapezoid ABCD where m(A) = 80, the m(B) = 100. A and B are supplementary, but they do not make a straight line.

Similarly, in https://brilliant.org/practice/complementary-and-supplementary-angles/?p=4 angle A and B are supplementary, but they don't necessarily make a straight line. In fact, to be a straight line, A and B would have to be the same point. So there isn't enough information to determine.

Note by Frank Sobierajski
1 year, 4 months ago

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$...$$ or $...$ to ensure proper formatting.
2 \times 3 $$2 \times 3$$
2^{34} $$2^{34}$$
a_{i-1} $$a_{i-1}$$
\frac{2}{3} $$\frac{2}{3}$$
\sqrt{2} $$\sqrt{2}$$
\sum_{i=1}^3 $$\sum_{i=1}^3$$
\sin \theta $$\sin \theta$$
\boxed{123} $$\boxed{123}$$

Sort by:

Hi Frank,

In future, if you have an issue with a problem, you can click on the menu to select "Report problem", which will allow the problem creator to respond to you directly.

The phrase "angles form a straight line" does not mean that they currently form a line, but that they can be placed so as to form a straight line. For example, we say that the "angles in a triangle form a straight line", even though none of them meet at the same point.

Staff - 1 year, 4 months ago