Structure of Windmill ET MS
Wind energy is renewable. We can use windmills to convert wind energy to other forms
of energy. By observing the shape of a windmill, we can find isosceles triangles hidden
in its structure.
Measures, Shape and Space
9
2B
9.0 Pre-Learning (P. 9.2)
9.1 Simple Proofs involving Congruent Triangles and
Similar Triangles (P. 9.4)
9.2 Isosceles Triangles (P. 9.16)
9.3 Congruent Plane Figures (P. 9.29)
9.4 Similar Plane Figures (P. 9.40)
✂
Congruence and Similarity (II)
Q&A The windmill shown on the right has three blades
of the same length. Which of the following are
isosceles triangles?
3OAB, 3OAC, 3OBC, 3ABC
A
C
B
O