Question

Find the measure of line DC and line AD.
Line DB is an altitude.

(see figure below)

Plz answer, thanks :D

Answer 1

Both triangles are right-angled triangles. Thus u can use Pythagoras theorem to solve the question.
If u do not know what the theorem is about, see drawing..

the theorem states that, the 3 sides are related by the equation.
a^2 +b^2 = c^2

Thus back to the question..

DA = sqrt (8^2 + 10^2 )
=12.8

DC = sqrt (8^2 + 12^2)
=14.4

Answer 2

@alyn --> Do you need the answers in simplified radical form?

Answer 3

yes, i do...

Answer 4

i need the answers in simplified radical form

Answer 5

DA = √ 164 = 2 √ 41

DC =4 √ 13

Answer 6

DC^2=BC^2-BD^2
DC^2=144-64
DC^2=80
DC=SQRT(80)
AC=AB+BC
AC=10+12
AC=22