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Drawing Letters with
Perspective
2D Perspective
Drawing
Eye
Drawing
Drawing with
Pablo
Drawing with
Hands
Area Irregular Rectangle
with Triangle
Drawing Shapes with
Loops
Drawing
an Oval with String
Drawings with
Color
Face Drawing
Lessons
Drawing
Courses
Drawing a
One Point Perspective
Drawing
Rainbow Hearts with Lines
Drawing a
Realistic Face
A Thousand with
Singing
Circle Square
Triangle Songs
Composing
a Drawing
Composing a
Portrait Drawing
Drawing
for Kids with Colour
8:20
Khan Academy
Sal Khan
Worked example: Triangle angles (diagram)
We have a right triangle that's split into several smaller right triangles. The angle measures in any triangle always add up to 180 degrees. By using this fact and looking at complementary (adding up to 90 degrees) and supplementary (adding up to 180 degrees) angles, we can find the missing angle measures in the triangles.
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