Triangle abc is an obtuse triangle with the obtuse angle at vertex b. angle a must be

Angle A must be acute.

Both angle A and C must be acute. The sum of the angles in a triangle is 180°.

An obtuse angle is more than 90°, so the sum of the remaining 2 angles has to be less than 90°.

Note that it is impossible to have:

It is possible to have an obtuse-angled isosceles triangle, but the vertex angle must be obtuse and the equal base angles will be acute.

Option A on Edge is correct, less than 90 degrees

Step-by-step explanation:

got it right

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

you have to put the graph on here with the question

step-by-step explanation: