How many endpoints does a ray have? ā 1.A ray has exactly ONE endpoint ā where it begins. It then extends infinitely in one direction.
An angle of 90Ā° is called: ā Right.A 90Ā° angle is a RIGHT ANGLE ā it looks like the corner of a square.
An angle LESS than 90Ā° is called: ā Acute.ACUTE angles are less than 90Ā° ā smaller than a right angle. Think "sharp" (acute = sharp).
An angle GREATER than 90Ā° but less than 180Ā° is called: ā Obtuse.OBTUSE angles are between 90Ā° and 180Ā° ā wider than a right angle but not a straight line.
An angle of exactly 180Ā° is called: ā Straight.A 180Ā° angle is a STRAIGHT ANGLE ā it looks like a straight line!
A side of a polygon is best described as a: ā Line segment.Every side of any polygon is a LINE SEGMENT ā it has two endpoints and a fixed length.
Which real-world object best represents a RAY? ā A beam of light from a flashlight.A flashlight beam starts at a point (the flashlight) and extends outward indefinitely ā just like a ray!
In ā PQR, which point is the vertex? ā Q.In any 3-letter angle name, the MIDDLE letter is always the vertex. Q is the vertex of ā PQR.
How many pairs of perpendicular sides does a rectangle have? ā 4.A rectangle has 4 corners, each with a right angle. That makes 4 pairs of perpendicular adjacent sides.
A trapezoid has exactly one pair of parallel sides. What are they called? ā Bases.In a trapezoid, the parallel sides are called the BASES (top and bottom).
A rhombus has 4 equal sides. Are its sides perpendicular? ā No ā rhombus sides meet at non-right angles (unless it is a square).A rhombus has equal sides but they meet at non-right angles. Only a SQUARE has both equal sides AND perpendicular sides.
Streets in a city grid: Main St. runs east-west and Oak Ave. runs north-south. They are: ā Perpendicular.East-west and north-south directions are perpendicular ā they cross at 90Ā°.
Which shape has NO parallel sides at all? ā Scalene triangle.A scalene triangle has 3 sides of different lengths ā none are parallel to each other.
A parallelogram has opposite sides parallel. If its angles are all 90Ā°, it is a: ā Rectangle.A parallelogram with 4 right angles is a RECTANGLE (or square if all sides are equal).
Two streets cross at a 60Ā° angle. They are: ā Intersecting but not perpendicular.They cross (so not parallel) but NOT at 90Ā° (so not perpendicular). They are simply intersecting.
How can you TEST if two lines are perpendicular? ā Place a corner of paper at the intersection ā if sides align, they are perpendicular (90Ā°).A piece of paper corner = 90Ā°. If both lines align with the paper corner, they are perpendicular!
A regular pentagon has how many lines of symmetry? ā 5.A regular pentagon has 5 lines of symmetry ā one from each vertex to the midpoint of the opposite side.
Can a shape have MORE THAN ONE line of symmetry? ā Yes ā many shapes have multiple lines of symmetry.YES! Squares have 4, regular hexagons have 6, circles have infinitely many lines of symmetry.
A scalene triangle (all sides different) has how many lines of symmetry? ā 0.A scalene triangle has NO lines of symmetry because no fold produces matching halves.
A regular polygon with n sides has ___ lines of symmetry. ā n.A regular n-gon has EXACTLY n lines of symmetry. Pentagon: 5 lines, hexagon: 6 lines, etc.
Which of these shapes has the MOST lines of symmetry? ā Regular hexagon (6).Regular hexagon has 6 lines of symmetry ā more than square (4), triangle (3), or rectangle (2).
The letter "H" has how many lines of symmetry? ā 2.H has 2 lines of symmetry: one vertical (top-to-bottom) and one horizontal (left-to-right) through the crossbar.
Can a line of symmetry be DIAGONAL (not horizontal or vertical)? ā Yes ā squares and rhombuses have diagonal lines of symmetry.YES! A square has 2 DIAGONAL lines of symmetry (corner to corner), in addition to its 2 straight lines.
A heart shape (ā„) has how many lines of symmetry? ā 1 (vertical through the top notch).A heart has 1 line of symmetry ā the vertical line through the notch at the top and the point at the bottom.