Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

G-M > Geometry > Flashcards

Geometry Flashcards

1
Q

Line

A

connecting two points and extending indefinitely

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Ray

A

half-line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Line segment

A

have two endpoints

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Angle

A

union of two rays sharing a common endpoint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Acute angle

A

whose measure is more than 0 degree but less than 90

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Right angle

A

exactly measures as 90 degree

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Obtuse angle

A

the measure is more than 90 degree but less than 180 degree

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Straight line

A

exactly 180 degree

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Are the diagram drawn to scale

A

no - so an angle might be 1 degree or angle number 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When n line intersect through a common point

A

the sum of all the angles created by those n lines ta that point is 360 degree

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Intersecting line is perpendicualr

A

each angle formed between that line are a 90 degree

- two straight lines are said to be perpendicular when they intersect and form four right angles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Supplementary angle

A

angle that add up to 180 degree

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Transversal line

A

two parallel lines cut by a line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

When lines are cut by a vertical line

A

vertical angles are equal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Triangle add up to

A

180 degree

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Largest angle of a triangle

A

opposite of the longest side of the triangle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Smallest angle

A

opposite of the shortest side of the triangle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Exterior angle

A

Given any polygon, when taking one exterior angle at each vertex, the sum of the measure of the exterior angles will always equal to 360

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The measure of the two exterior angles of the triangle is equal to the sum of the measure of the

A

two remotes interior angles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

altitude

A

height

21
Q

In any triangle, the sum of the lengths of any two sides of the triangles is greatest than the length of the

A

third side

22
Q

In any triangle, the difference of the lengths of any two sides of the triangles is less than the length of the

A

third side

23
Q

scalene

A

no sides are the same

24
Q

isosceles

A

two sides are the same

25
Q

equilateral

A

all sides are the same

26
Q

acute triangle

A

each of its side is less than 90 degree (can be scalene, isosceles or equilateral)

27
Q

obtuse triangle

A

one angle is greater than 90 but less than 180 (can be scalene, isosceles)

28
Q

right angle triangle

A

one angle is 90 degree (can be scalene, isosceles)

29
Q

Pythagorean triple #2

A

5-12-13

- any factors/combination of this will be Pythagorean triple so {10-24-26}, { 15-36-39} and so on will be the triples

30
Q

Pythagorean triple #1

A

3-4-5

- any factors/combination of this will be Pythagorean triple -> so {6,8,10}, { 9,12,15} and so on will be the triples

31
Q

The area of an isosceles right triangle can be found using the formula

A

I^2/2 where I is the length of one of side

32
Q

The side of a 45-45-90 right triangle are in a set ratio of

A

x, x, and xrad2 where x rad 2 represents the lengths of the hypotenuse and x represents the length of each of the shorter legs

33
Q

A square diagonal cuts the square into

A

two 45-45-90 right triangles

34
Q

The side of a 30-60-90 right triangle are in a set ratio of

A

Always exhibit the same ratio of x: xrad 3, 2x

35
Q

Area of an equilateral triangle

A

(s square rad 3)/4

36
Q

Cutting an equilateral triangle in half form

A

makes the triangle 30, 60, and 90-degree triangle

37
Q

Two triangles are similar if

A

one triangle is simply an enlargement of another triangle

38
Q

Triangles can be similar if (1)

A

three angles of one triangle are the same measure as three angles of another triangle

39
Q

Triangles can be similar if (2)

A

three pairs of corresponding sides have lengths in the same ratio

40
Q

Triangles can be similar if (3)

A

an angle of one triangle is the same measure as an angle if another triangle and the sides surrounding these angles are in the same ratio

41
Q

Sum of Interior angle

A

180 (n-2), where n is the number of sides

42
Q

Square

A

all sides are 90 degree

43
Q

Rectangle

A

opposite sides are equal

44
Q

Rhombus

A

all sides are equal

45
Q

The perimeter of a semi-circle

A

not half of what the circle rather it’s -> pi(r)+2r

46
Q

A measure of central angle is always half the

A

measure of the central angle

47
Q

Arc Length

A

2(pi)(r)(C/360); where C is the central angle and

48
Q

Area of sector

A

(pi)(r^2)(C/360), where C is the central angle

G-M (29 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions