help fast

[versed geode]

Area = 5(x)+x(2x+1)

[tiny bramble]

i dont get it

[versed geode]

OA is a radius

And there's a rule that says the angle between any radius and a tangent is 90°

So OAB is a right angle

that's a right angled triangle so you could use pythagoras to get OB

[tiny bramble]

thanks!

help

im so stuck

[versed geode]

Just do pythagoras and you'll get that equation

[versed geode]

Here you got a right angled triangle BCD

[versed geode]

BC=CD=8

do pythagoras to get BD which is the diameter of the circle

now you can get the area of the circle

then get the area of the square and subtract it from the area of the circle

that gets you the area of the shaded parts

@tiny bramble

[tiny bramble]

Thanks!

[tiny bramble]

help