मराठी
तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ७

Find the missing values in the following table for the circles with radius (r), diameter (d) and Circumference (C). - Mathematics

Advertisements
Advertisements

प्रश्न

Find the missing values in the following table for the circles with radius (r), diameter (d) and Circumference (C).

radius (r) diameter (d) Circumference (C)
15 cm    
बेरीज
Advertisements

उत्तर

Given: radius r = 15 cm

∴ diameter d = 2 × 15 = 30 cm

Circumference C = πd units

= `22/7 xx 30`

= `660/7`

= 94.28 cm

Tabulating the results

radius (r) diameter (d) Circumference (C)
15 cm 30 cm 94.28 cm
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Measurements - Exercise 2.1 [पृष्ठ २७]

APPEARS IN

सामाचीर कलवी Mathematics - Term 2 [English] Class 7 TN Board
पाठ 2 Measurements
Exercise 2.1 | Q 1. (i) | पृष्ठ २७

संबंधित प्रश्‍न

n Fig. 2, PQ and PR are two tangents to a circle with centre O. If ∠QPR = 46°, then ∠QOR equals:

(A) 67°
(B) 134°
(C) 44°
(D) 46°


Two tangents TP and TQ are drawn to a circle with centre O from an external point T. Prove that ∠PTQ = 2∠OPQ.


Tangents PA and PB are drawn from an external point P to two concentric circles with centre O and radii 8 cm and 5 cm respectively, as shown in Fig. 3. If AP = 15 cm, then find the length of BP.


Equal circles with centres O and O' touch each other at X. OO' produced to meet a circle with centre O', at A. AC is a tangent to the circle whose centre is O. O'D is perpendicular to AC. Find the value of\[\frac{DO'}{CO}\]


Radius of a circle with centre O is 4 cm. If l(OP) = 4.2 cm, say where point P will lie.


Find the length of the chord of a circle in the following when: 

Radius is 1. 7cm and the distance from the centre is 1.5 cm 


AB and CD are two equal chords of a drde intersecting at Pas shown in fig. P is joined to O , the centre of the cirde. Prove that OP bisects  ∠ CPB. 


In an equilateral triangle, prove that the centroid and center of the circum-circle (circumcentre) coincide.


If O is the centre of the circle, find the value of x in each of the following figures


Draw circle with the radii given below.

4 cm


Find the diameter of the circle

Radius = 6 cm


In the given figure, point P is 26 cm away from the centre O of a circle and the length PT of the tangent drawn from P to the circle is 24 cm. Then the radius of the circle is ______ 

 


In the following figure, if ∠OAB = 40º, then ∠ACB is equal to ______.


In the following figure, ∠AOB = 90º and ∠ABC = 30º, then ∠CAO is equal to ______.


AB and AC are two equal chords of a circle. Prove that the bisector of the angle BAC passes through the centre of the circle.


On a common hypotenuse AB, two right triangles ACB and ADB are situated on opposite sides. Prove that ∠BAC = ∠BDC.


From the figure, identify a diameter.

 


A figure is in the form of rectangle PQRS having a semi-circle on side QR as shown in the figure. Determine the area of the plot.


Assertion (A): If the circumference of a circle is 176 cm, then its radius is 28 cm.

Reason (R): Circumference = 2π × radius of a circle.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×