true or false
1. The sum of all angles of a triangle is 360°.
2. All the sidesof a square are congruent.
3. A right triangle can be an isosceles.
4.The opposite sides of a trapezoid are parallel.
5. A triangle with 107° angle can be named acute angle.
6. Intersecting lines are always perpendicular.
7. Perpendicular lines are always intersecting.
8. Perpendicular lines intersect and form a right angle.
9. Acute triangle has 3 acute angles.
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Answer:
1.true
2.true
3true
4.false
5.true
6.false
7.false
8.true
9.false
not sure based on my experience lang po