Triangle
A triangle is a plane figure bounded by three straight lines. A triangle has three sides and three angles, and each one of them is called an element of the triangle.
Here, PQR is a triangle, its three sides are line segments PQ, QR and RP; ∠PQR, ∠QRP and ∠RPQ are its three angles.
The point at which any two sides meet is called a vertex. Thus, a triangle has three vertices. The vertices of the triangle PQR are P, Q and R.
The side opposite to a vertex is called a base.
The above figure of a triangle PQR, QR is the base when the vertex is P.
Exterior opposite angles:
If a side QR of a triangle PQR is produced to S then the ∠PRS is called the exterior angle at R.
Interior opposite angles:
The two opposite angles, that is ∠PQR and ∠QPR are called interior opposite angles.
Perimeter:
The sum of the three sides of a triangle is called the perimeter of the triangle.
The perimeter of the triangle PQR is (PQ + QR + RP)
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.
Recent Articles
-
Place Value | Place, Place Value and Face Value | Grouping the Digits
Oct 04, 24 09:47 AM
The place value of a digit in a number is the value it holds to be at the place in the number. We know about the place value and face value of a digit and we will learn about it in details. We know th… -
Worksheet on Subtraction | Practice the Questions | Free Answers
Oct 04, 24 01:28 AM
In worksheet on subtraction, all grade students can practice the questions on subtracting numbers with more than two digits. This exercise sheet on subtraction can be practiced by the students -
Subtraction Word Problems - 2-Digit Numbers | Subtraction Problems
Oct 03, 24 03:22 PM
Understand the concept on subtraction word problems - 2-digit numbers for the second grade. Read the question carefully to subtract the two-digit numbers to find the differences and follow the -
Worksheet on Checking Subtraction Using Addition | Free Answers | Math
Oct 03, 24 02:22 PM
Here we can use addition to check the answer for the subtraction. Subtract ans check your answer. Find the difference and check your answer using addition. -
Check for Subtraction and Addition | Checking Subtraction | Problems
Oct 03, 24 01:13 PM
We will learn to check for subtraction and addition answers after solving. Difference of two numbers is correct when the sum of the subtrahend number and the difference is equal to the minuend.
New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.