The triangles are isosceles. The following notation are for the angles. For example ABD is refer to the angle located in the B vertex, formed by the segments AB and BD.

$ABD = ADB\\40 + 2ADB = 180\\ADB = 70 = ABD\\$

$70 + DBC + 30 = 180\\DBC = 180 - 100 = 80$

Then

$BCD = BCD\\2BCD + 80 = 180\\BCD = 50$

3 0

3 years ago

Sarah is twice as old as her youngest brother. If the difference Between their ages is 15 years. How old is the youngest brother

Leto [7]

I'm not to sure but i think it's 15. this question is worded weirdly

6 0

3 years ago

a total of 600 books were labelled A,B,C and D.Given that 1/4 of the book is labelled A and 3/10 of the book is labelled B.There

Marizza181 [45]

Answer:

255 is the answer........

5 0

3 years ago