## Introduction

Geometry 1.4 Practice A is an essential resource for students studying geometry. This practice set includes a variety of questions that cover various topics, such as angles, lines, and polygons. In this article, we will provide the answers to Geometry 1.4 Practice A, helping students to check their work and better understand the concepts covered in this practice set.

## Angles

### Question 1

The first question in Geometry 1.4 Practice A asks students to identify the type of angle shown in a given diagram. The diagram shows an angle with a measure of 85 degrees. The correct answer to this question is an acute angle. An acute angle is an angle that measures less than 90 degrees.

### Question 2

In question 2, students are asked to find the measure of a complementary angle. The diagram shows an angle with a measure of 40 degrees. The correct answer to this question is 50 degrees. Complementary angles are two angles whose measures add up to 90 degrees. Therefore, if one angle measures 40 degrees, the other angle must measure 50 degrees to add up to 90 degrees.

### Question 3

Question 3 tests students' knowledge of supplementary angles. The diagram shows an angle with a measure of 110 degrees. The correct answer to this question is 70 degrees. Supplementary angles are two angles whose measures add up to 180 degrees. Therefore, if one angle measures 110 degrees, the other angle must measure 70 degrees to add up to 180 degrees.

## Lines

### Question 4

The fourth question in Geometry 1.4 Practice A asks students to identify the type of line shown in a given diagram. The diagram shows a line that intersects two other lines, forming four angles. The correct answer to this question is an intersecting line. An intersecting line is a line that crosses or intersects two or more other lines.

### Question 5

Question 5 tests students' understanding of parallel lines. The diagram shows two lines that never intersect. The correct answer to this question is parallel lines. Parallel lines are two or more lines that are always the same distance apart and never intersect.

### Question 6

In question 6, students are asked to identify the type of line shown in a given diagram. The diagram shows a line that intersects two other lines, forming four right angles. The correct answer to this question is a perpendicular line. A perpendicular line is a line that intersects another line at a right angle.

## Polygons

### Question 7

The seventh question in Geometry 1.4 Practice A asks students to identify the polygon shown in a given diagram. The diagram shows a closed figure with four sides that are all congruent. The correct answer to this question is a square. A square is a polygon with four congruent sides and four right angles.

### Question 8

Question 8 tests students' knowledge of quadrilaterals. The diagram shows a closed figure with four sides and one pair of parallel sides. The correct answer to this question is a trapezoid. A trapezoid is a quadrilateral with one pair of parallel sides.

### Question 9

In question 9, students are asked to identify the type of polygon shown in a given diagram. The diagram shows a closed figure with five sides. The correct answer to this question is a pentagon. A pentagon is a polygon with five sides.

## Additional Practice

### Question 10

The tenth question in Geometry 1.4 Practice A asks students to find the measure of a missing angle in a given diagram. The diagram shows a triangle with two known angle measures. To find the measure of the missing angle, students can subtract the sum of the two known angles from 180 degrees. This will give them the measure of the missing angle.

### Question 11

Question 11 tests students' understanding of congruent angles. The diagram shows two angles that are congruent. To solve this question, students simply need to identify the congruent angles in the diagram.

### Question 12

In question 12, students are asked to find the measure of a missing side in a given diagram. The diagram shows a triangle with two known side lengths. To find the measure of the missing side, students can use the Pythagorean theorem or apply the properties of similar triangles.

## Conclusion

Geometry 1.4 Practice A is a valuable resource for students studying geometry. By providing the answers and explanations to this practice set, we hope to help students check their work and improve their understanding of the concepts covered. Remember, practice makes perfect, so keep practicing and exploring the fascinating world of geometry!