When you rounded 0.15 to the nearest tenth , it's 0.2
y² = 8y - 15 (alternate angles are equal)
y² - 8y + 15 = 0
(y - 5)(y - 3) = 0
y = 5 or 3
x + 8y - 15 = 180 (angles in a straight line add up to 180)
when y = 5
x + 40 - 15 = 180
x = 155°
when y = 3
x + 24 - 15 = 180
x = 171°
Answer: 127.5
Step-by-step explanation:
You will literally never use this l mao
but you start by writing out
2x+7+6x-9=180
then you get x=22.75
and enter that into the largest angles equation
6(22.75)-9
and get the answer: 127.5
Answer:
when the plane intersects the base and all three lateral faces of the pyramid
Step-by-step explanation:
When a plane intersects a plane, it forms a line.
A triangular pyramid has four faces.
To form four straight lines and therefore a quadrilateral, the intersecting plane must intersect all four faces.
