Plane Geometry T1

Two quantities that are equal to the same quantity are equal to each other.

True

A straight angle contains 180 degrees

True

A right angle may also be obtuse.

False

An obtuse angle may have only one obtuse angle.

True

If two lines are perpendicular, then they form right angles.

True

If a triangle is equilateral, it is also acute.

True

If two angles are equal, then they are supplementary.

False

A bisector of one angle of a triangle is perpendicular to the side opposite of that angle.

False

Two angles whose sum is a right angle are said to be supplementary.

False

The legs of an isosceles triangle are equal.

True

The whole is greater than the sum of its parts

False

Two angles that have a common side are ___ adjacent.

Sometimes

If equal quantities are multiplied by equal quantities, the products are ___ equal.

Always

If two straight lines intersect, the vertical angles formed are ___ equal.

Always

Two angles that are supplementary are ___ equal.

Sometimes

An equilateral triangle is ___ equilangular

Always

Three angles that have a sum of 90 degrees are ___ complementary.

Never

A bisector of a line segment _ passes through the midpoint of the segment

Always

The bisectors of two supplementary angles are ___ perpendicular to each other.

Always

An obtuse triangle is ___ isosceles.

Sometimes

The supplement of a right angle is ___ a right angle

Always

A scalene triangle has ___

b. no sides equal

If the non-common sides of two adjacent angles lie in opposite directions on a straight line, then the two angles are ___

c. supplementary

An angle of 90 degrees is ___

d. none of these

If two lines are perpendicular, they form at the point of intersection ___

b. right angles

A line segment has___

a. two endpoints

If the sum of two angles is an obtuse angle, at least one of the angles must be ___

a. acute

As the size of an angle increases, the size of its supplement ___

b. decreases

In a right triangle, the side that is opposite the right angle is called the ___?

hypotenuse

If two angles are vertical angles, then they are ___?

equal

If equal quantities are added to equal quantities, the ___ are equal.

sums

If equal quantities are subtracted from equal quantities, the ___ are equal.

remainders (or differences)

If an angle is labeled RTS the vertex lies at point___.

T

If two angles, neither of which is a right angle, are complementary, they must both be___

acute

If two angles are both equal and complementary, their measures are___

45 degrees

If a polygon has 8 sides, the size of an angle at the center is ___?

45 degrees

The supplement of an acute angle is a(n) ___ angle.

obtuse

If two quantities are equal to the same quantity, or to equal quantities, then they are___?

equal

Construct a regular polygon of five sides, with each side equal to the given segment a. (Use your protractor to draw the angles.)

---

Construct a triangle with sides of the give lengths

---

Construct a triangle which has all three sides equal to the given length.

---

Draw a triangle that has the given base and base angles of 65 degrees and 35 degrees.

---