Question

113
3. ABC is an isosceles triangle in which altitudes
BE and CF are drawn to equal sides AC and AB
respectively (see Fig. 7.31). Show that these
E
yo
th
altitudes are equal.
B.
Fig. 7.31
4. ABC is a triangle in which altitudes BE and CF to
sides AC and AB are equal (see Fig. 7.32). Show
that
F
E
(1) AABEEAACF
(m) AB=AC, i.e., ABC is an isosceles triangle.
B
Fig. 7.32
A
5. ABC and DBC are two isosceles triangles on the
same base BC (see Fig. 7.33). Show that
LABD=2ACD.
B
Fig. 7.33
D
6. AABC is an isosceles triangle in which AB = AC.
Side BA is produced to D such that AD = AB
(see Fig. 7.34). Show that BCD is a right angle.
7. ABC is a right angled triangle in which ZA= 90°
and AB = AC. Find zB and ZC.
8. Show that the angles of an equilateral triangle
are 60° each
B
с
Fig. 7.34​

Answer 1

Answer:

67 is the answer

Step-by-step explanation:

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