3 Truths and a Lie about Triangles.notebook
3 Truths
and
a Lie about Triangles
September 15, 202
A
Angles in a triangle will ALWAYS add to 180 degrees
Which one is the lie?
(
A
Angles
B
For sides a. b. andc:
in a triangle will ALWAYS
add to 180 degrees
True!
a+ 0 >c ALWAYS
|
C For sides a.b, andc: a’ +b? = c’ ALWAYS.
D_
Longest side is ALWAYS across from biggest angle
_
and Smallest side ALWAYS across from smallest angle
Oct 14-8:19 AM
8.
For sides a,b, andc:
Oct 14-8:24 AM
a + b> c ALWAYS
C. For sides a. b, andc:
TRUE!
be longer than the third side
(
btc>a
atc>b
If you know two sides and need the 3rd..
1,
a’ + b’ = c? ALWAYS.
FALSE!
In any triangle, two sides must always add up to
atb>c
This is only true for RIGHT Triangles
Called Pythagorean Theorem
t
4
.
a-b<c<atb
Example:
two sides are 4 and 11.
What are possible lengths of 3rd?
Oct 14-8:29 AM
D.
Longest side is ALWAYS
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across from biggest angle
and Smatiest side ALWAYS across from smallest angle
True!
.
c
wom.
a
-
Which is bigger,
borc?
Oct 14-8:29 AM
Sep 15-8:40 AM