Grade 10 Applied Math

Today was a fun day doing some Anchor charts for Similar Triangles.

Remember some basic facts.
The interior angles of every triangle always = 180`
When two angles in two triangles are the same, then the triangles have to be similar, by the AA method. And that if all sides between two triangles share the same ratio, then the triangles are also similar by the SSS method.

We finished today's class with a note on How to Find the Sides in a Similar Triangle.

For example if /\ <- Triangle

if /\ABC and /\DEF are similar and AC=12 and AB=X, and DF=8 and DE = 4. What would be the length of side AB?
x/4 = 12/8
8x=48
x=48/8
x=6

Remember, lastly, the rules regarding Angles and their patterns when talking about parallel lines. (z patter, c pattern, f pattern, and x pattern) The patterns are important.
Mr. Denys