There are no angles in the letter l it is a straight line That's not right. There is one angle in the Letter l. its a 180 degree angle.
Right angles of 90 degrees
In the upper-case letter A? I see none, nor in lower case a either.
Acute angles
A right angle of 90 degrees can be seen in the letter F
There are no angles in the letter l it is a straight line That's not right. There is one angle in the Letter l. its a 180 degree angle.
There are 3 right angles in the letter F
Right angles of 90 degrees
In the upper-case letter A? I see none, nor in lower case a either.
Acute angles
A right angle of 90 degrees can be seen in the letter F
In the letter N, you can see two acute angles formed by the diagonal lines that intersect at the top point and the bottom right point of the letter.
Certain kinds of trapezoids only have one pair of equal angles. Like so... ________ |...............\ |................\ |.................\ |..................\ ---------------- See? The only congruent angles are the two right angles on the left side. (Ignore the dots, it was the only way I could get my diagram to format properly)
3 Angles
An isosceles triangle has at least two equal sides and two equal angles An isosceles triangle has two or more congruent sides called legs. In an isosceles triangle with just two congruent sides, the angle formed by the legs is called the apex, and the other two angles, called base angles, are congruent. If the isosceles triangle has three congruent sides (AKA an equilateral triangle), then all three sides and angles are congruent, and there are no definitive base or vertex angles, besides...all of them. See related link below for the web address
You could see them in squares.
An isosceles triangle has at least two equal sides and two equal angles An isosceles triangle has two or more congruent sides called legs. In an isosceles triangle with just two congruent sides, the angle formed by the legs is called the apex, and the other two angles, called base angles, are congruent. If the isosceles triangle has three congruent sides (AKA an equilateral triangle), then all three sides and angles are congruent, and there are no definitive base or vertex angles, besides...all of them. See related link below for the web address