Given: ABCD ∥gram,
BK ⊥ AD , AB ⊥ BD
AB=6, AK=3
Find: m∠A, BK
To proof
as given BK ⊥ AD
thus ΔABK is a right triangle.
thus by using the pythagoras theorem
we have
AB² = BK² + AK²
BK² = AB ²- AK²
= 6² - 3²
= 36 - 9
= 27
Hence
BK = <u>
unit</u>
Now find the value m∠A
by using the trignometric function
FORMULA
cosA = 
cosA = 
= 
m∠A = 60°
hence proved
Answer:
Original cost was $19.99
Step-by-step explanation:
100% - 15% = 85%
16.99 / 0.85 = 19.99
To check:
19.99 * 0.15 = 2.998
19.99 - 2.998 = 16.992 = 16.99
Correct!!
Answer:
360cm²
Step-by-step explanation:
area of the parallelogram = base x height
base = 40 -10= 30cm
height = height of the triangle
A = 30*12= 360
Awe sorry no one responded quick enough... did u get it tho?
Rate =distance/time
:)
it's the famous d=r*t (distance is rate multiply by time)
therefore, changing the way of expressing the equation d/t =r you can use it to find r
