Observation table:
m2ABC
mZABE mZEBD
(y)
m2FBC
Is
m_DBF
(z)
X = y = Z =
Conclusion: Using the compass and ruler, the given angle can be
divided into given number of equal parts.
Learning outcome: The student understands to divide the angle
into equal parts using compass and ruler.
Test your knowledge: (1) If 2ABC is divided into equal parts and
measure of each part is 20 °, then what is m LABC ?
(2)If 2ABC =° and is divided
into 8 equal parts then what is
the measure of each parts?
AR
Answer:
prove that their centres lie on the perpendicular bisector of the common chord. Hint: First draw 2 circles such that they intersect at two points then join the intersecting points and point of centre. Then use congruence of triangles