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**ALEKS Geometry Answers**

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Yes, we will be discussing all ALEKS basic geometry topics including all previously asked questions.

**Q.** Angle**Ans: **a figure formed by two rays that have the same endpoint.

**Q.** Circle**Ans: **the set of all points in a plane that lie the same distance from a single point in the plane.

**Q.** Perpendicular lines**Ans: **intersecting lines that form right angles.

**Q.** Parallel lines**Ans:** These are lines that belong to the same plane and never intersect.

**Q.** line segment**Ans: **a part of a line consisting of two endpoints and all points between them.

**Q.** Congruent**Ans: **exactly the same shape and size.

**Q.** Collinear**Ans: **belonging to the same line.

**Q.** Coplanar**Ans: **belonging to the same plane.

**Q.** Vertical Angles**Ans: **Two nonadjacent angles formed by two intersecting lines

**Q.** Collinear Points**Ans: **Points that lie on the same line

**Q.** Intersect**Ans: **Two distinct lines that have a point in common

**Q.** Scalene Triangle**Ans: **No sides have the same length

**Q.** Isosceles Triangle**Ans: **Two or three sides have the same length

**Q.** Equilateral Triangle**Ans: **All three sides have the same length. Note: All Equilateral Triangle are also Isosceles Triangles

**Q.** Side-Side-Side (SSS) Congruent Property**Ans: **If each side of one triangle is congruent to each side of another triangle, then the triangles are congruent

**Q.** Side-Angle-Side (SAS) Congruence Property**Ans: **If two sides and the angle between them in another triangle, then the triangles are congruent

**Q.** How many degrees are in a right angle?**Ans: **90

**Q.** What is an “Acute” Angle**Ans: **An angle that measures less than 90

**Q.** Angles in the same plane with a common vertex & a common side, but no common interior points.**Ans: **Adjacent

**Q.** Opposite angles in an “X”.**Ans: **Vertical

**Q.** Angles whose measure sum up to 180 degrees.**Ans: **Supplementary

**Q.** An angle whose measure is exactly 90 degrees.**Ans: **right

**Q.** Two angles added together to produce 90 degrees**Ans: **Complementary

**Q.** How many sides does a pentagon have?**Ans: **5

**Q.** Opposite sides are parallel; all sides are equal; each angle is a right angle**Ans: **Square

**Q.** Angle R and angle S are supplementary angles. If angle R measures 28 degrees, what is the measure of angle S?**Ans: **152

**Q.** A car wheel has a diameter of 75 cm. What is the circumference of the wheel?**Ans: **235.5

**Q.** 4 types of transformations**Ans: **translations, reflections, relations, dilations

**Q.** when a figure can be turned around the dot shown to get another figure**Ans: **rotation

**Q.** when we can slide one figure to get another**Ans: **translation

**Q.** when we can reflect a figure across a line to get another (mirror image)**Ans: **reflection

**Q.** when reflecting across the y axis**Ans: **the points have the same y coordinate and opposite x coordinates

**Q.** when reflecting across the x axis**Ans: **they have the same x coordinate and opposite y coordinates

**Q.** rotating a figure 90 degrees clockwise around origin**Ans: **(a,b) to (b,-a)

**Q.** rotating a figure 90 degrees counterclockwise around origin**Ans: **(a,b) to (-b,a)

**Q.** rotating the figure 18o degrees around origin**Ans: **(a,b) to (-a,-b)

**Q.** if a figure can be rotated about some point by some angle less than 360 and appear unmoved**Ans: **it has rotational symmetry

**Q.** if a figure can be rotated 180 degrees about some point and appear unmoved**Ans: **it has point symmetry

**Q.** making one figure from another and the figures are similar (magnify or shrink) by use of a scale factor and multiplication**Ans: **dilation

*Note: Algebra questions in ALEKS are prepared by professional mathematicians whose areas of expertise give the program the ability to ask questions that are both challenging and beneficial to the learning process*.

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