0
True. The reasoning behind it is this: the sum of the angles in any triangle will always equal 180o.
Equilateral (all sides & angles equal)
3x = 180
x = 60
Isosceles (two equal sides & angles) - can include Right triangle (90 + 45 + 45)
x + 2y = 180
y = (180-x)/2
No matter what x equals (acute, right, or obtuse), y will be less than 90 (acute) because half of 180 is 90 and half of anything less than 180 will be less than 90.
Scalene (all sides & angles different) - can include Right triangle (90 + x + y)
x + y + z = 180
If one angle is obtuse...
x > 90
180 - x < 90
y + z < 90
If together they are less than 90, then clearly both are less than 90 (acute)
Add your answer:
Earn +20 pts
Which shapes have acute angles?
All triangles have at least two acute angles. Acute triangles have three. Rhomboids also have two acute angles.
Can a triangle have two acute angles?
Yes. In fact, all triangles MUST have at least two acute angles.
Can a triangle have 2 acute angles?
yesss, because in an equilateral triangle all the angles are 60 degrees!! Most triangles have acute angles! :) xx
What shapes contain only acute angles?
A triangle is the only shape that can have only acute angles inside it.
How are acute angles obtuse angles and right angles alike?
They are alike in that they are all triangles when you close them. They are different because they are all different degree amounts.
What types of triangles have at least two acute angles?
All triangles need at least two acute angles
Which shapes have acute angles?
All triangles have at least two acute angles. Acute triangles have three. Rhomboids also have two acute angles.
What is the least number of angles an acute triangle can have?
All acute triangles have 3 interior angles and 3 exterior angles. This is true for all triangles.
Do all acute triangles have only one acute angle?
No. All triangles MUST have at least two acute angles.
Do all triangles have at least to acute angles?
Yes.
Do all triangles have an acute angle?
All triangles have at least 2 acute angles. All 3 angles of a triangle will equal 180 degrees.
Do all triangles have two acute angles?
INCORRECT: No because there is a obtuse triangle and a right triangleCORRECT ANSWERYes all triangles have at least two acute angles. Obtuse triangles and right triangles also have at least two acute angles. They are called obtuse triangles and right triangles because by definition they are triangles with ONE obtuse angle and ONE right angle. So therefore they both have 2 acute angles. Also for an acute triangle, it would have 3 acute angles.
Do all triangles have at least two acute angles?
Yes
How many triangles have at least two acute angles?
All of them
Can a triangle have two acute angles?
Yes. In fact, all triangles MUST have at least two acute angles.
Do triangles have at least one right angle?
Triangles can be classified by their sides or their angles. When classifying them by their angles, triangles are called: acute triangles - all three angles are acute (less than 90º) right triangles - one right angle (90º) and two acute angles obtuse triangles - one obtuse angle (larger than 90º) and two acute angles
What is a triangle with at least 2 acute angles?
All triangles have at least two acute angles so the question does not add any further value.
