# #mathsTLP 28th June 2015

Welcome back! We have a book giveaway this week from @SAGEeducation

Follow this link to enter the draw, and receive a 40% discount even if you aren’t the winner!

Here are this week’s starters:

Lesson 1: Icebreaker activities for a new class

[tweet https://twitter.com/mathsjem/status/615220913525628928 width = ‘600’] [tweet https://twitter.com/Craigos87/status/615221487998488576 width = ‘600’] [tweet https://twitter.com/MissNorledge/status/615218024178692096 width = ‘600’]

Lesson 2: Real Life Trigonometry

[tweet https://twitter.com/solvemymaths/status/615223557656850432 width = ‘600’] [tweet https://twitter.com/MissNorledge/status/615222953349939200 width = ‘600’] [tweet https://twitter.com/mathsjem/status/615222392932204544 width = ‘600’] [tweet https://twitter.com/WorkEdgeChaos/status/615231385914187778 width = ‘600’] [tweet https://twitter.com/mathsjem/status/615231615573340161 width = ‘600’] [tweet https://twitter.com/mathsjem/status/615231710310043648 width = ‘600’] [tweet https://twitter.com/MissNorledge/status/615231844842385408 width = ‘600’] [tweet https://twitter.com/nishadealwis/status/615232061826277376 width = ‘600’]

Lesson 3: Cover Lesson Ideas

[tweet https://twitter.com/7puzzle/status/615221901225533444 width = ‘600’] [tweet https://twitter.com/mathsjem/status/615222929379475456 width = ‘600’] [tweet https://twitter.com/WorkEdgeChaos/status/615221298411761664 width = ‘600’] [tweet https://twitter.com/frimymaths/status/615225702384799745 width = ‘600’]

Lesson 4: Algebraic Balancing Scale Problems

[tweet https://twitter.com/solvemymaths/status/615222408061042688 width = ‘600’] [tweet https://twitter.com/ColleenYoung/status/615224222789566465 width = ‘600’] [tweet https://twitter.com/MrMattock/status/615222054414061569 width = ‘600’] [tweet https://twitter.com/solvemymaths/status/615225765098033152 width = ‘600’] [tweet https://twitter.com/ColleenYoung/status/615226656597405700 width = ‘600’] [tweet https://twitter.com/ByrdGrainne/status/615226942585995265 width = ‘600’]

Lesson 5: Solving Equations With Unknown on Both Sides

[tweet https://twitter.com/DJUdall/status/615225397123379200 width = ‘600’] [tweet https://twitter.com/MathsPadJames/status/615225950238867456 width = ‘600’] [tweet https://twitter.com/MrMattock/status/615225649624711170 width = ‘600’] [tweet https://twitter.com/RobAnthony01/status/615225651419848705 width = ‘600’] [tweet https://twitter.com/tessmaths/status/615226686053834753 width = ‘600’]

Lesson 6: Interior / Exterior Angles

via RobCham

# Area Problem #20

The triangle ABC passes through the centre of the circumscribed circle.

The area of triangle ABC = 643.5cm2

The perimeter of triangle ABC = 143 cm

Find the area of the circle in terms of pi.